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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety and determinism profile is fully covered. The description adds only that results come back as 'pages with thumbnails', which is largely redundant with the existing output schema and says nothing about pagination behavior or result limits.

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 well-formed sentence with the action and resource front-loaded and no filler. The trailing return-value clause is the one mildly expendable element given the output schema exists.

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?

All four parameters are required-free and fully documented, an output schema covers return values, and annotations cover the safety profile, so an agent has enough to call this correctly. The only shortfall is the absence of any routing hint among the many similarly named sibling tools.

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%, so every parameter (query, cursor, category, pageSize) is already documented in the input schema. The description echoes the query dimension ('letter, topic or practice task') but adds no syntax, matching behavior, or combination rules beyond that. Baseline 3 applies when the schema does the heavy lifting.

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 gives a specific verb plus resource — 'Searches the CursiveLines handwriting lessons and guides' — and enumerates the searchable dimensions (letter, topic, practice task). It is clearly distinct from sibling tools like generate_signature or make_worksheet, though it never names a 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?

Usage is implied by the phrasing 'by letter, topic or practice task', which hints at search-style retrieval as opposed to the direct lookups offered by show_letter or show_alphabet. However, there is no explicit statement of when to choose this over those siblings, and no exclusion guidance.

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