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

Annotations already establish readOnly=true, idempotent=true, openWorld=true, destructive=false, so the safety profile is covered. The description adds that this returns full text rather than the snippets seen in search results, which is useful, but says nothing about behavior on invalid/expired ids 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.

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

A single sentence with the action, the resource, and the id-provenance constraint, front-loaded and free of filler.

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 one-parameter read tool with no output schema, the description of what comes back (full text of a document or profile) plus where the id originates is nearly enough. It stops short of noting failure modes or response shape, but nothing essential 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?

Schema coverage is 100% and the schema description already explains the id formats (page URL or supplier:<CC>:<domain>) from search results. The description repeats rather than extends this, so the baseline 3 is appropriate.

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 (fetch) and resource (full text of a document or manufacturer profile), and ties the input to the search workflow. It is distinguishable from search_site/search, though it doesn't explicitly frame itself against siblings like get_my_profile or get_request.

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?

'by the id returned from search' implies the prerequisite workflow (search first, then fetch), which is genuine guidance. However there is no explicit when-to-use vs when-not statement and no acknowledgement of the other get_* siblings that also retrieve records.

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