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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds meaningful context beyond that: the endpoint is public and requires no token, the call returns the complete document, and the content includes DVS task integration examples. It does not describe failure behavior for an invalid or stale URI, which keeps it below a 5.

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?

Five short sentences, each carrying distinct information: what it reads, auth posture, required input source, content of interest, and scope exclusion. The scope exclusion is placed last where it clarifies rather than delays, and nothing repeats the schema or title.

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 single-parameter read tool with an output schema present and annotations covering safety, the description supplies everything else an agent needs: auth requirements, where the URI comes from, what the payload contains, and what it is not for. Return-value detail is correctly omitted because the output schema covers it.

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 100% for the single uri parameter, so the baseline would be 3. The description earns above baseline by specifying the URI's provenance and format expectation (filesfm-docs:// URI obtained from filesfm_search_docs or resources/list), which is operational guidance the schema does not contain.

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 (read) and resource (one complete official Files.fm document or OpenAPI specification), and explicitly distinguishes itself from organization-record tools with 'This reads documentation, not organization records.' An agent can separate it from filesfm_dvs_get_document and filesfm_search_docs without opening any schema.

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?

Gives clear context: fetch the filesfm-docs:// URI returned by filesfm_search_docs or resources/list, which tells the agent the prerequisite step and the companion tool. It also excludes a misuse case (organization records). It stops short of naming the specific sibling to use for org records, so it is clear rather than exhaustive.

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