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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds valuable behavioral context: the WordPress record typically carries only a project link, not report prose, and the actual report text is in attached PDFs. This helps the agent set expectations about the return value. It doesn't describe pagination or error behavior, but for a single-fetch read tool with these annotations, the added context is strong.

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?

The description is a single, well-structured sentence that front-loads the core action, then adds the key caveat about PDFs and WordPress records. Every clause earns its place; no filler or repetition of schema details.

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 read-only fetch tool with two optional parameters and no output schema, the description covers the essential context: how to identify the publication, what the return contains (project link and PDF links), and the important caveat that report text lives in PDFs. It doesn't specify the exact return shape, but with no output schema and a simple resource, the description is sufficient for an agent to call it correctly.

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%, so both parameters (id and link) are already documented in the schema. The description adds the relationship between id and search_law_commission_publications, and clarifies that link is an alternative to id, which is useful but not a major addition beyond the schema. 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?

The description clearly states the tool fetches one Law Commission publication by id or link, and distinguishes it from search_law_commission_publications by naming that sibling as the source of the id. It also specifies the resource type (consultation paper, report, summary, terms-of-reference), making the purpose unambiguous.

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 description explicitly says the id comes from search_law_commission_publications, and that a lawcom.gov.uk link can be used as an alternative. It also tells the agent when to expect the actual report text in the PDF rather than the WordPress record, which guides correct use.

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