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mcp-oauth-remote-gateway

Manual OAuth for remote MCP servers on headless gateways.

58

Quality

73%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./optional-skills/mcp/mcp-oauth-remote-gateway/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

73%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a strong operational skill: an unambiguous sequenced workflow with real validation checkpoints, deep hard-won pitfalls, and a genuine diagnostic script backing the decision tree. Its weaknesses are length-driven — repeated explanations of the same failure mode and inlineable reference material — and a few key steps specified as instructions rather than executable code.

Suggestions

Explain the 127.0.0.1-redirect failure once (in the "Why" section) and reference it elsewhere in a clause, cutting three restatements across Overview, Fallbacks, and the Dashboard section.

Move the worked-example detail of pitfalls 7/9/10 (and the long dashboard front-door guide) into references/ files, keeping one-line summaries plus pointers in SKILL.md.

Replace the step 7 field list and step 10 fragment with a complete copy-paste Python block that exchanges the code and writes both token files in the same block (which pitfall 16 already mandates).

DimensionReasoningScore

Conciseness

The pitfalls are dense, non-obvious operational knowledge that earns their tokens, but the 127.0.0.1-callback failure is restated four times (Overview, "Why the Built-in OAuth Flow Fails", "Cheap First Fallbacks", "Preferred Front Door"), and several pitfalls (e.g. 15's "This is the OAuth 2.0 spec, not a provider quirk") explain protocol background Claude already knows. This matches 'mostly efficient but includes some unnecessary explanation or could be tightened' rather than the 4-anchor's minor trimmable instances.

3 / 5

Actionability

Highly concrete throughout: exact curl probes, a redaction-piped env grep, full RFC 7591 registration JSON, exact token-file schemas with perms and filename sanitization regex, and a runnable diagnostic script. It falls short of 5 because the PKCE generation (step 5), token exchange (step 7), and smoke-test (step 10) give formulas/field lists and a partial Python fragment rather than copy-paste-ready code for the two most security-critical operations.

4 / 5

Workflow Clarity

The 11 numbered steps have explicit validation checkpoints — verify state (CSRF, step 7), stash-and-verify code_verifier across turns, and "smoke-test the token BEFORE asking the user to reload" (step 10) — plus an escalation order (built-in fallbacks → dashboard → manual) and a full error-recovery decision tree in pitfalls 7/9/10 with recovery order and a script that prints the branch. This matches the 5 anchor: clear sequence, explicit validation, feedback loops for error recovery.

5 / 5

Progressive Disclosure

The bundle matches the body's references: both cited files (scripts/diagnose-oauth-mcp.py, references/stripe-mcp-oauth-revocation.md) exist, are one level deep, and are clearly signaled in "Quick Reference Files" with when-to-use guidance. Structure is good, but the ~370-line body inlines large sections (17 pitfalls, the dashboard front-door guide) that could live in separate reference files, which is the 'minor organization gaps' of the 4 anchor rather than the well-split 5 anchor.

4 / 5

Total

16

/

20

Passed

Description

65%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is highly distinctive and hits the natural keywords of its niche, but it is a single terse fragment: one implied action, no enumeration of the skill's actual capabilities, and no explicit 'use when' trigger clause. Adding a trigger clause and naming the concrete actions would move it from good to excellent.

Suggestions

Add an explicit trigger clause, e.g. "Use when adding or re-authenticating an OAuth MCP server on a remote/headless Hermes gateway (container, VPS) where the localhost callback cannot reach the process."

Enumerate the concrete capabilities: register an OAuth client via DCR, run the PKCE flow manually, and write tokens in Hermes' exact schema so /reload-mcp finds them.

Include one or two natural synonyms users would say ("token", "container", "VPS") to broaden trigger coverage without adding fluff.

DimensionReasoningScore

Specificity

"Manual OAuth for remote MCP servers on headless gateways" names the domain (remote MCP servers, headless gateways) plus one concrete action (performing OAuth manually), matching the '1-2 concrete actions, but not comprehensive' anchor. It omits the skill's actual capabilities (registering the client, exchanging tokens, writing Hermes' token files, enabling a token-cached reload), so it is not the 4-anchor 'several specific actions'.

3 / 5

Completeness

The 'what' is clear (manual OAuth), but there is no 'Use when...' clause or equivalent explicit trigger guidance — the 'when' is only weakly implied by the constraint "on headless gateways", which caps completeness at 3 per the judging guidelines. It is not a 2 because the 'what' is specific and the deployment context does narrow the 'when'.

3 / 5

Trigger Term Quality

"OAuth", "MCP", "remote", and "headless" are terms a user with this problem would naturally say, giving good keyword coverage. Natural synonyms a user might say instead — "token", "authentication", "container", "VPS", "callback" — are absent, so it falls short of the comprehensive 5 anchor.

4 / 5

Distinctiveness Conflict Risk

"Manual OAuth for remote MCP servers on headless gateways" carves out a clear niche with distinct triggers (remote/headless MCP OAuth) and virtually no overlap risk with generic MCP, OAuth, or deployment skills. It matches the 'clear niche with distinct triggers; minimal conflict risk' anchor.

5 / 5

Total

15

/

20

Passed

Validation

81%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 13 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_version

'metadata.version' is missing

Warning

metadata_field

'metadata' should map string keys to string values

Warning

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

13

/

16

Passed

Repository

NousResearch/hermes-agent

Path

optional-skills/mcp/mcp-oauth-remote-gateway/SKILL.md

Reviewed

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