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

No annotations are provided, so the description carries the full burden. 'Fetch' indicates a read operation, but it does not disclose what happens when the id is not found (e.g., error vs null), nor the return format. For a simple get, this is minimal but not misleading.

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 zero waste. It immediately states the verb, resource, and method. Perfectly concise for the complexity.

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 simple one-parameter get, the description is minimally sufficient: it indicates the operation and target. However, with no output schema and no annotations, it does not explain the return value structure or error behavior, leaving some ambiguity for an agent.

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 description must compensate for the lack of parameter documentation. It does not add any meaning to the 'id' parameter beyond the schema's basic type and required flag. The description merely says 'by id' without explaining what id represents or its format.

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?

The description clearly states the action (fetch), the resource (roadmap phase), and the method (by id). It distinguishes itself from list_phases by implying a single record retrieval. The verb is specific and unambiguous.

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?

The description implicitly signals usage: you use this when you have a specific id and want one phase, as opposed to list_phases for all phases. However, it does not explicitly state when not to use it or name alternatives, so it misses the explicit guidance level.

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