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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds meaningful non-schema context: document ownership is enforced, a personal API key bearer token is mandatory, and the response carries a mandated 'disclosure and method' the agent must follow. It does not describe failure modes (e.g. non-owned document, missing key) 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?

Front-loaded with the workflow role, then returns, then auth, then next steps. Two tight paragraphs with no filler, though the formatting is slightly broken by the indentation and mid-sentence line break.

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, and the workflow with sibling tools is fully mapped. The remaining gap is the single required parameter, whose semantics are only partially covered by the description.

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% and there is one undocumented parameter, so the description must compensate. It adds that the document must be one the authenticated user owns ('ownership enforced'), which is real semantic content, but gives no guidance on ID format or source. Adequate but incomplete.

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 ('fetches one of the authenticated user's documents') and situates it precisely as 'Step 1 of a bring-your-own-agent fact-check.' An agent can immediately distinguish it from siblings like ground_claim, submit_findings, and get_findings, which are named as downstream steps.

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?

Explicitly sequences the workflow: after this, call ground_claim(claim) once per checkable claim, then submit_findings(...). It also states the required context ('Requires a personal Storskarvia API key as a Bearer token'). It does not spell out when NOT to use it or what to do if the bearer token is missing, so it falls just short of 5.

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