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OpenAPI Directory MCP Server

get_api

Retrieve detailed information about any API from the OpenAPI directory by specifying its provider, version, and service.

Instructions

Get detailed information about a specific API

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
providerYesProvider name (e.g., "googleapis.com", "azure.com")
apiYesAPI version (e.g., "v3", "2.0")
serviceNoService name (optional, required for some APIs)
Behavior2/5

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

No annotations provided, and the description only states 'Get detailed information' without disclosing behavioral traits such as read-only nature, authentication requirements, or rate limits.

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

Conciseness3/5

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

Single sentence is short but could be more informative; does not fully earn its place as it omits necessary details.

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?

Given 3 parameters and 20 sibling tools, the description is too minimal. It does not provide enough context for an agent to use the tool correctly or select it over alternatives.

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 does not need to add parameter info. It adds no extra meaning beyond the schema.

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

Purpose3/5

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

Describes verb and resource ('Get detailed information about a specific API') but lacks specificity on what 'detailed information' includes, failing to distinguish from siblings like get_api_summary or 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 guidance on when to use this tool versus alternatives. With many sibling tools performing similar functions, the absence of selection criteria is a significant gap.

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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