compare_toolsSide-by-side quality profiles for 2–5 tools by slug. Same fields as get_skill; ordering follows the request, not rank.
| Name | Required | Description | Default |
|---|---|---|---|
| slugs | Yes |
| Name | Required | Description | Default |
|---|---|---|---|
| compared | Yes | ||
| not_found | No |
Changes observed during successful MCP inspections.
Output schema / properties / compared / items / properties / verificationAdded value: +{
+ "anyOf": [
+ {
+ "additionalProperties": false,
+ "properties": {
+ "commit_sha": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "failing_check": {
+ "additionalProperties": false,
+ "properties": {
+ "id": {
+ "type": "string"
+ },
+ "path": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ }
+ },
+ "required": [
+ "id",
+ "path"
+ ],
+ "type": "object"
+ },
+ "stale": {
+ "type": "boolean"
+ },
+ "status": {
+ "type": "string"
+ },
+ "tier": {
+ "anyOf": [
+ {
+ "enum": [
+ "runs",
+ "loads-clean"
+ ],
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "verified_at": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "status",
+ "tier",
+ "commit_sha",
+ "verified_at",
+ "stale"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+ ]
+}Output schema / properties / compared / items / requiredPrevious value: -[
- "name",
- "slug",
- "tier",
- "quality_score",
- "composite_score",
- "risk_level",
- "risk_reasons",
- "type",
- "category",
- "platforms",
- "description",
- "repo_url",
- "profile_url",
- "stars",
- "is_official",
- "last_commit_at",
- "license",
- "forks",
- "scores",
- "structural_signals",
- "readme_length",
- "release_count",
- "latest_release_at",
- "discovered_at",
- "updated_at"
-]New value: +[
+ "name",
+ "slug",
+ "tier",
+ "quality_score",
+ "composite_score",
+ "risk_level",
+ "risk_reasons",
+ "type",
+ "category",
+ "platforms",
+ "description",
+ "repo_url",
+ "profile_url",
+ "stars",
+ "is_official",
+ "last_commit_at",
+ "verification",
+ "license",
+ "forks",
+ "scores",
+ "structural_signals",
+ "readme_length",
+ "release_count",
+ "latest_release_at",
+ "discovered_at",
+ "updated_at"
+]Input schema / $schemaPrevious value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"Output schema / (root)Previous value: -nullNew value: +{
+ "$schema": "https://json-schema.org/draft/2020-12/schema",
+ "additionalProperties": false,
+ "properties": {
+ "compared": {
+ "items": {
+ "additionalProperties": false,
+ "properties": {
+ "category": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "composite_score": {
+ "type": "number"
+ },
+ "description": {
+ "type": "string"
+ },
+ "discovered_at": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "forks": {
+ "type": "number"
+ },
+ "is_official": {
+ "type": "boolean"
+ },
+ "last_commit_at": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "latest_release_at": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "license": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "name": {
+ "type": "string"
+ },
+ "platforms": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ },
+ "profile_url": {
+ "type": "string"
+ },
+ "quality_score": {
+ "type": "number"
+ },
+ "readme_length": {
+ "anyOf": [
+ {
+ "type": "number"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "release_count": {
+ "type": "number"
+ },
+ "repo_url": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "risk_level": {
+ "type": "string"
+ },
+ "risk_reasons": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ },
+ "scores": {
+ "additionalProperties": false,
+ "properties": {
+ "composite": {
+ "type": "number"
+ },
+ "github": {
+ "anyOf": [
+ {
+ "type": "number"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "quality": {
+ "type": "number"
+ },
+ "recency": {
+ "anyOf": [
+ {
+ "type": "number"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "social": {
+ "anyOf": [
+ {
+ "type": "number"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "star_velocity_30d": {
+ "anyOf": [
+ {
+ "type": "number"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ },
+ "trending": {
+ "anyOf": [
+ {
+ "type": "number"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ }
+ },
+ "required": [
+ "quality",
+ "composite",
+ "github",
+ "social",
+ "recency",
+ "trending",
+ "star_velocity_30d"
+ ],
+ "type": "object"
+ },
+ "slug": {
+ "type": "string"
+ },
+ "stars": {
+ "type": "number"
+ },
+ "structural_signals": {
+ "additionalProperties": false,
+ "properties": {
+ "config_files": {
+ "type": "boolean"
+ },
+ "examples": {
+ "type": "boolean"
+ },
+ "gotchas": {
+ "type": "boolean"
+ },
+ "progressive_disclosure": {
+ "type": "boolean"
+ },
+ "scripts": {
+ "type": "boolean"
+ },
+ "skill_md": {
+ "type": "boolean"
+ },
+ "verification": {
+ "type": "boolean"
+ }
+ },
+ "required": [
+ "skill_md",
+ "examples",
+ "gotchas",
+ "verification",
+ "scripts",
+ "progressive_disclosure",
+ "config_files"
+ ],
+ "type": "object"
+ },
+ "tier": {
+ "enum": [
+ "curated",
+ "promising",
+ "experimental",
+ "review_required"
+ ],
+ "type": "string"
+ },
+ "type": {
+ "type": "string"
+ },
+ "updated_at": {
+ "anyOf": [
+ {
+ "type": "string"
+ },
+ {
+ "type": "null"
+ }
+ ]
+ }
+ },
+ "required": [
+ "name",
+ "slug",
+ "tier",
+ "quality_score",
+ "composite_score",
+ "risk_level",
+ "risk_reasons",
+ "type",
+ "category",
+ "platforms",
+ "description",
+ "repo_url",
+ "profile_url",
+ "stars",
+ "is_official",
+ "last_commit_at",
+ "license",
+ "forks",
+ "scores",
+ "structural_signals",
+ "readme_length",
+ "release_count",
+ "latest_release_at",
+ "discovered_at",
+ "updated_at"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "not_found": {
+ "items": {
+ "type": "string"
+ },
+ "type": "array"
+ }
+ },
+ "required": [
+ "compared"
+ ],
+ "type": "object"
+}Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds genuinely new behavioral context: output ordering follows the request order, not a quality rank, which prevents a real misinterpretation of the results.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two compact clauses, zero filler, and the core identity (side-by-side comparison for 2–5 tools) is front-loaded before the secondary ordering caveat.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
An output schema exists so return-field detail is unnecessary, and the description still helpfully points to get_skill for field shape plus the ordering semantics. Nothing critical is missing for correct invocation; only explicit when-to-use routing would improve it.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description must carry the parameter meaning — and it does, giving the input type (slugs), the slug format, and the valid count range (2–5). That largely compensates for the undocumented array constraints, though slug pattern/length details only live in the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (compare) and resource (tools), with scope bounds (2–5 tools by slug). It explicitly contrasts with the single-tool sibling by noting it returns 'the same fields as get_skill', so an agent can distinguish it from get_skill without opening a schema.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
'For 2–5 tools by slug' implies the bulk/multi-entity case versus get_skill, but the description never states when to prefer this over get_skill or search_skills, nor any exclusions. Usage is inferable from the count constraint rather than spelled out.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.