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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint=false, so the safety profile is covered. The description adds only the relevance-ordering behavior ('best match first'); it says nothing about result counts, pagination, or how matches are scored.

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 actionable content is front-loaded in the first sentence, which is good. However, the second sentence reads as run-on marketing copy ('plans, search, and the whole Meditations, Enchiridion and Seneca's letters read a passage at a time') and does not clearly earn its place.

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?

With only one parameter and full schema coverage, plus annotations covering the safety profile, the definition is close to adequate. But with no output schema, the description never gives a hint about the shape of returned results, leaving a small but real gap for a search tool.

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 parameter already documents its purpose with examples ('anger or death'), so the schema does the heavy lifting. The description adds corpus context (Marcus Aurelius, Epictetus, Seneca) that hints at useful query vocabulary but no syntax or matching rules.

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 first sentence gives a specific verb (search) and resource (curated readings) plus result-ordering behavior (best match first), which clearly separates it from read-oriented siblings like get_reading or list_readings. It does not explicitly name a sibling as the alternative, so it stops short of a 5.

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 statement of when to use this search versus list_readings, get_today, or get_reading. The only implied guidance comes from the word 'search', leaving the agent to infer the retrieval strategy.

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