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Rekl0w

MCP OpenAPI Discovery

by Rekl0w

list_endpoints

List endpoints from OpenAPI documents with optional filtering by tag, method, or path fragment.

Instructions

List endpoints from a discovered OpenAPI document with optional filtering by tag, method, or path fragment.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesDocs page URL or direct OpenAPI JSON/YAML URL
tagNoOptional tag filter, e.g. users
methodNoOptional HTTP method filter
pathContainsNoOptional path or summary substring filter
includeDeprecatedNoInclude deprecated endpoints; defaults to true
limitNoMaximum endpoint count to return; defaults to 50
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided; description lacks details on side effects, authentication, rate limits, or pagination behavior beyond what the schema provides.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence, no wasted words, front-loaded with primary action and filters.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With 6 parameters, no output schema, and no annotations, the description is too brief. Missing return format, filter logic (AND/OR), defaults, and relation to siblings.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Input schema covers 100% of parameters with descriptions; the tool description restates some but adds no new semantic value beyond schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'List' and resource 'endpoints' with optional filters (tag, method, path fragment). It distinguishes from siblings like search_endpoints and get_endpoint_details.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit guidance on when to use this tool versus alternatives (e.g., search_endpoints, detect_openapi). No when-not-to-use or prerequisites mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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