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

Annotations already declare this is a safe, non-destructive, closed-world read, so the safety profile is covered. The description adds the useful scoping detail that it acts on the *canonical* draft keyed by *stable* API ID, but it says nothing about what is checked, whether a failed validation is an error or a result, or side effects on the draft.

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 tightly-written sentence with the action, target, and lookup key all front-loaded. No filler and nothing to trim.

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 values need not be described. However, for a validation tool the key missing context is what constitutes a valid/invalid draft and how that surfaces to the caller, which the description leaves entirely unexplained.

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 coverage is 0%, so the schema does not document apiId at all. The description partially compensates by clarifying it is a 'stable API ID' (implying the immutable identifier rather than a name or version), but it does not state the expected format or where such an ID comes from.

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 (Validate) and resource (the current canonical draft for an API), plus the lookup key. It is distinguishable from siblings like draft_get, though it never explicitly contrasts itself with that tool or with api_get.

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?

There is no guidance on when to validate versus when to simply fetch the draft with draft_get, nor any mention of prerequisites (e.g., that a draft must exist) or what a validation run is meant to catch. The agent must infer the use case entirely.

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