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

Annotations already declare readOnlyHint=true, so the safe read nature is covered structurally. The description adds that the returned values are public URLs (i.e., a static, non-mutating lookup), but says nothing about whether the list is fixed, whether it requires network access, or how many links are returned.

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?

A single front-loaded sentence with no filler; every word contributes to identifying the resource returned.

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?

For a no-parameter, read-only lookup with annotations covering the safety profile and no output schema, the description is essentially sufficient. A brief note on the returned link set (count or categories) would close the remaining gap, but nothing needed to invoke it correctly is missing.

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?

The tool takes zero parameters, so there is nothing to document beyond what the schema shows; baseline 4 applies. The description correctly implies no inputs are needed to obtain the discovery URLs.

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 ('Return') and a specific resource ('main public API discovery and documentation URLs for NoCapMocap'). This is clearly separable from siblings such as get-api-examples and get-export-formats, which return different artifacts.

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?

No indication of when this tool should be used versus the sibling discovery tools (get-site-summary, get-api-examples), and no mention of prerequisites or ordering. Usage as an entry point for API onboarding is only implied by the word 'discovery'.

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