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OpenAPI Directory MCP Server

get_endpoints

Retrieve a paginated list of API endpoints by providing an API identifier. Optionally filter by tag and set page size.

Instructions

Get a paginated list of endpoints for a specific API with minimal information

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
api_idYesAPI identifier (e.g., "googleapis.com:admin", "github.com")
pageNoPage number (default: 1)
limitNoNumber of endpoints per page (default: 30, max: 100)
tagNoOptional tag filter to show only endpoints with specific tag
Behavior3/5

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

With no annotations, the description partially covers behavior by stating it returns a paginated list. However, it omits details about authentication, error handling, or what 'minimal information' includes.

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?

The description is a single sentence that is front-loaded and concise, containing no unnecessary words.

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

Completeness3/5

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

The description does not explain the return structure of the paginated list (e.g., metadata like total count, next page), which is important for an agent to parse results. Given no output schema, more detail would be beneficial.

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?

Schema coverage is 100%, so the description adds no additional meaning to parameters. Baseline of 3 is appropriate as schema already documents all four parameters.

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 tool gets a paginated list of endpoints for a specific API with minimal information, differentiating it from siblings like get_endpoint_details which provide more detail.

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 when-to-use or when-not-to-use guidance is provided. The description does not direct the agent to alternatives like get_endpoint_details for detailed endpoint info or get_api for overall API info.

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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