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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds no behavioral context beyond what annotations provide, but it also does not contradict them. Baseline 3 given annotations carry the burden.

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?

Single concise sentence with no waste, front-loading the verb, resource, and key lookup parameter. The example is appended efficiently.

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 lookup with annotations covering safety and no output schema, the description is minimally adequate. It states what the tool does but omits return value expectations, error behavior, and how it relates to sibling lookup tools, leaving some gaps.

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 description coverage is 0%, but there is only one parameter. The description gives an example value ('merge-pdf') which clarifies the expected id format, adding some value. However, it does not explain whether the id is a slug, UUID, or other identifier, nor what happens if an invalid id is provided.

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 and resource ('Get one DocuGrip tool by its id') and provides a concrete example id, making the purpose unambiguous. However, it does not distinguish itself from the sibling 'find_pdf_tool' or 'list_pdf_tools', which are semantically adjacent and would benefit from explicit differentiation.

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 provides no guidance on when to use this tool versus alternatives like find_pdf_tool or list_pdf_tools. The example id is helpful but does not constitute usage context or exclusions.

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