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

The annotations already communicate that this is a safe, read-only, non-destructive operation. The description adds what data will be returned but does not disclose behaviors such as not-found handling, pagination, or response shape. This is adequate but not rich; the description adds only mild value beyond the annotations.

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 delivers the verb, resource, identifier, and expected content with zero filler. All essential information is front-loaded; the sentence is compact and easy to parse.

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 single-resource read with one required parameter and no output schema, the description is complete enough: it explains what to pass and what to expect. It omits edge-case behavior like missing IDs, but the task is simple and the annotations already cover the safety profile. A small gap remains in describing possible failure responses.

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?

The single parameter is already fully documented in the schema: 'GrantSonar grant UUID (from a search_grants result).' The description essentially restates the same meaning with 'by its GrantSonar grant_id (UUID),' so it adds no meaningful parameter semantics beyond the schema.

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 uses a specific verb ('Fetch') and a clear resource ('full detail of a single grant opportunity'), and it names the key content areas (synopsis, eligibility, deadlines, award amounts). This clearly distinguishes it from list/search siblings like search_grants and list_my_applications.

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 intended use is implied clearly: call this when you already have a GrantSonar grant_id from a search result, and you need the full detail of one grant. It does not explicitly state when not to use it or name alternatives, but the contrast with list/search tools is evident from the description.

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