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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description usefully adds that this returns the *full* record rather than the hit summary, but says nothing about failure behavior for unknown ids or whether the record can be missing/stale after a search.

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?

A single front-loaded sentence with no filler; purpose lands first, qualifier second. It is arguably too terse for the ambiguity against sibling retrieval tools, but 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?

An output schema exists, so return-value detail is legitimately omitted, and with one required parameter and full annotation coverage the basics are complete. The definition still leaves an agent guessing how it differs from get_by_name and fetch when both name and id are available.

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% and the single 'id' parameter is documented in-schema as coming from a search_knowledge hit, so the description adds nothing new beyond echoing that provenance. Baseline 3 applies when the schema carries the load.

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 — fetch the full record — and qualifies it by origin ('behind a search hit id'), which cleanly separates it from the summarised results a search returns. It does not name the sibling it complements (search_knowledge), but the implicit reference is 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?

'Behind a search hit id' and 'for page rendering' imply the call follows a search and feeds a detail view, so usage is inferable. However, with siblings like fetch, get_by_name, and search in the set, the description never states when to pick this over those alternatives or what happens if the id is stale.

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