# Talos Linux MCP Server MCP Server

MCP server for Talos Linux — resources, services, logs, health, config, lifecycle via gRPC.

**Publisher claimed.** No tool list reported, and Pod has not connected to this server.

## Status

Pod has not dialled Talos Linux MCP Server yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

## Connect

Published as `talos-mcp` on npm. Runs locally.

## Known issues

**57 problems reported by people outside the maintainer team.** Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 12.

### Most discussed

### feat(upgrade-k8s): add talos_upgrade_k8s tool

> **Rewritten 2026-06-03** per maintainer decision (proceed via `go-kubernetes`). This body supersedes the original gRPC-based proposal and the 2026-04-16 plan comment. See the pinned clarification comment for the rationale and the verified findings.

### Severity

P2 — moderate

### Category

reliability

### Description

No `talos_upgrade_k8s` tool exists. Kubernetes component upgrades require an operator to break out of the MCP-first workflow and run `talosctl upgrade-k8s` from a shell, reint

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/30) · 2026-04-07 · open · 4 comments

### chore(http): migrate off deprecated StreamableHTTPOptions.CrossOriginProtection before go-sdk v1.8.0

---
type: chore
status: triage
risk: low
---

## Intent
Replace the deprecated `StreamableHTTPOptions.CrossOriginProtection` field assignment with the `protection.Handler(mcpHandler)` wrapper form so the HTTP transport keeps compiling after go-sdk v1.8.0 removes the field.

## Context
PR #177 (commit `5dc4794`) restored cross-origin protection by setting `StreamableHTTPOptions.CrossOriginProtection: &http.CrossOriginProtection{}` in `cmd/talos-mcp/main.go:315`. The staff review of #177 flagged t

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/180) · 2026-05-11 · closed · 2 comments

### chore(governance): document and enforce GitHub branch protection rules

### Severity

P2 — moderate

### Category

security, governance

### Description

There is no evidence of GitHub branch protection rules in the repository. Without protection, anyone with write access can push directly to `main`, bypassing CI, and automatically trigger a release via `auto-tag.yml` → `release.yml`.

### Evidence

No branch protection configuration found in the repository. `auto-tag.yml` triggers on every push to `main` and creates a semver tag. The created tag triggers `release.y

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/77) · 2026-04-08 · closed · 2 comments

### extractMachineConfigBody fragile with 0% test coverage

## Description

`extractMachineConfigBody` in `internal/tools/lifecycle.go` contains two distinct code paths (legacy protobuf format and YAML annotation format) with no unit tests. The function relies on assumptions about Talos' internal `MachineConfig` serialization format. A format change in a future Talos version would break this silently.

## Evidence

`internal/tools/lifecycle.go:360–389` — two branches:
1. Legacy: direct protobuf field access
2. Current: YAML-annotated struct traversal

Ne

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/47) · 2026-04-07 · closed · 2 comments

### Partial multi-node responses silently omit unreachable nodes

## Description

When a multi-node tool call includes an unreachable node, that node's response is silently absent from the result. No error indicator, no partial flag, and no per-node status is returned. The caller receives a response that appears complete but is missing data.

## Evidence

`internal/talos/client.go:125–133` — node strings are forwarded to `talosclient.WithNodes` without any mechanism to detect or surface per-node failures. The Talos gRPC response format embeds per-message error

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/46) · 2026-04-07 · closed · 2 comments

### Most recent

### feat(resources): support MCP resource subscriptions backed by COSI watch

### Severity

P2 — enables reactive agents; high implementation cost.

### Category

Protocol feature adoption (MCP `resources/subscribe` + `notifications/resources/updated`).

### Description

MCP clients can subscribe to resource URIs to receive push updates when the underlying data changes. talos-mcp-server exposes two static resources and two templates (`internal/resources/resources.go:25–51`) but never registers a subscription handler. Talos gRPC provides native `Watch` semantics on the COS

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/148) · 2026-04-15 · closed · 0 comments

### feat(server): implement argument completion for tool inputs

### Severity

P2 — UX improvement, no correctness impact.

### Category

Protocol feature adoption (MCP `completion/complete`).

### Description

talos-mcp-server declares tools with free-form string arguments (`nodes`, `namespace`, `service_name`, `type`/resource alias, config paths) but does not register a completion handler. MCP clients that implement `completion/complete` (Claude Desktop, Cursor) therefore cannot offer autosuggest for any argument. We already have authoritative sources for t

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/147) · 2026-04-15 · closed · 0 comments

### feat(tools): emit MCP progress notifications for long-running mutating tools

### Severity

P1 — affects operator UX on every destructive operation.

### Category

Protocol feature adoption (MCP progress notifications).

### Description

Mutating tools that wait on the Talos cluster (`talos_reboot wait=true`, `talos_upgrade`, `talos_reset`, `talos_apply_config` with wait) block silently for up to 5 minutes (default reboot timeout per `CLAUDE.md § Safety`) before returning. MCP supports progress notifications via `notifications/progress` keyed by a caller-provided `progres

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/146) · 2026-04-15 · closed · 0 comments

### feat(tools): declare output schemas and return structured content for read-only tools

### Severity

P1 — high value, low risk.

### Category

Protocol feature adoption (MCP tool output schema + structured content).

### Description

All 17 read-only tools in `cmd/talos-mcp/main.go:182–352` currently return unstructured text (`textResult(...)`) without declaring an `OutputSchema`. Since go-sdk v1.5.0 (now in use on `main`), declaring an output schema and returning `StructuredContent` lets MCP clients consume the payload as typed JSON instead of re-parsing prose. The MCP spec forma

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/145) · 2026-04-15 · closed · 0 comments

### docs(tools): document symlink limitation of TALOS_MCP_ALLOWED_PATHS path allowlist

## Description

`talos_list_files` and `talos_read_file` follow symlinks on the node filesystem without verifying the resolved path against the `TALOS_MCP_ALLOWED_PATHS` allowlist. An operator who restricts access to `/etc` can be bypassed if a symlink outside `/etc` points into it (or vice versa: a symlink inside `/etc` resolves to a path outside the allowlist).

The path allowlist check (`checkPathAllowed`) is applied to the **request path** supplied by the caller, not to the symlink-resolved 

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/136) · 2026-04-09 · closed · 1 comment

### fix(tools): canonicalize incoming path in checkPathAllowed to prevent traversal bypass

## Description

`checkPathAllowed` in `internal/tools/files.go` uses `strings.HasPrefix(path, allowed)` to validate the incoming request path against the allowlist. The incoming path (`args.Path` / `listPath`) is never canonicalized with `filepath.Clean` before the prefix check.

## Evidence

`checkPathAllowed` (internal/tools/files.go):
```go
func checkPathAllowed(path string, allowed []string) error {
    for _, prefix := range allowed {
        if strings.HasPrefix(path, prefix) {
           

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/135) · 2026-04-09 · closed · 1 comment

### feat(tools): support config_file path in talos_apply_config to reduce token usage

## Problem or use case

`talos_apply_config` accepts the full machine config as an inline YAML/JSON string in the `config` parameter. A typical Talos machine config is 5,000–15,000+ tokens. When the AI agent passes this inline:

1. **The config consumes tokens twice** — once in the tool call arguments (agent output), once echoed back in the tool result context. For a 10K-token config this adds ~20K tokens per invocation.
2. **Dry-run + apply doubles the cost** — the recommended workflow calls th

[Read the thread](https://github.com/Nosmoht/talos-mcp-server/issues/133) · 2026-04-09 · closed · 0 comments

[See all 20 reports Pod holds for Talos Linux MCP Server](/mcp/talos-linux-mcp-server/issues) — of 57 qualified upstream.

## Firsthand observations

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