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

The annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, covering the safety profile. The description adds one useful behavioral note — this fetches rather than re-runs a scan, so there is no scan cost — but says nothing about failure behavior when the id/link is invalid or the report is missing.

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?

One sentence, front-loaded with the verb and resource, with each clause contributing (scope: already run; input: link or id; constraint: no rescan). Nothing is wasted.

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?

With one fully documented parameter and complete annotations, the call mechanics are clear. However, there is no output schema, so the description should indicate what a fetched report contains or its shape, and it is silent on error behavior — leaving a gap for a retrieval tool.

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% and the single 'report' parameter is already documented as a URL or id in the schema. The description restates the same accepted forms ('report link or id') without adding format, validation, or id-syntax detail, so the baseline 3 applies.

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 names a specific verb (Fetch) and resource (a report already run) and scopes it to fetching by link or id. The clause 'without scanning again' implicitly separates it from scan_website, though it never names that sibling explicitly.

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?

'that was already run' and 'without scanning again' imply the condition for use (a report must already exist) and hint at the alternative, but the description never states what to do when no report exists — e.g. use scan_website instead. Usage is suggested rather than prescribed.

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