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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds a useful return-shape detail (the reply opens with the fixed phrase "Steiner hat gesagt:"), but says nothing about what happens with an unknown GA number or how large tables of contents are handled.

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 payload-defining sentence is front-loaded and dense but readable. The second sentence about the fixed reply prefix is short and aids response recognition, though it is unusual framing that a reader might momentarily take as instruction rather than output description.

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 one-parameter read-only lookup with no output schema, the description covers both what the tool returns and the shape of the reply, which is enough for correct invocation. Missing only error/empty-result behavior and positioning relative to the other volume-related 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 coverage is 100% and the single parameter carries its own example ("GA 327"). The description never mentions the ga argument, so it adds no meaning beyond the schema; baseline 3 applies.

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 resource (one volume) and enumerates the returned fields (chapters/lectures with number, heading, date, place, pages), so the agent knows exactly what this yields versus a list or search tool. It does not name a sibling to contrast with, so it falls 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 explicit statement of when to call this versus list_works, search, read or count_matches, nor any precondition (e.g. resolve a volume via list_works first). The only implied guidance is that a GA identifier is required, which the schema already dictates.

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