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 only that results come back 'as cards' and span topics and papers, which is modest extra context. It says nothing about result richness, pagination, or ranking.

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 tight sentence with no filler. The 'sidebar's search' framing is slightly wasted given it says nothing about function, but the whole definition is short and front-loaded.

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-parameter read tool whose annotations cover safety and with no output schema to explain, the description covers the essentials of what is searched and the card return form. It remains incomplete on sibling differentiation, which is the main gap an agent needs.

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 'q' has no schema description (0% coverage), so the description must compensate. 'Matching words' hints that q is a keyword string, which adds some meaning beyond the schema's type and length bounds, but it does not explain matching semantics or expected input shape.

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?

It names a resource (topics and papers) and the matching behavior, implying a search verb. However, 'The sidebar's search' frames the tool by its UI location rather than its function, and it never distinguishes itself from the closely related sibling search_papers or find_entities. The core purpose is inferable but not sharply defined.

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?

There is no guidance on when to use this tool versus alternatives, even though search_papers is an obvious overlapping sibling. No exclusions, no context, no prerequisites are stated. The agent is left to guess the routing.

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