reading_reply_to_annotation

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

Annotations only carry a title, with no readOnlyHint or destructiveHint. The description implies a mutation ('Attach') but does not disclose whether it creates a new annotation record, modifies the parent, requires special permissions, or has side effects. With no annotation coverage, the description carries the full burden and does not meet it.

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 description is a single, front-loaded sentence that conveys the core action efficiently. It contains no filler, though it is so terse that it sacrifices important behavioral and parameter context.

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 an 8-parameter tool with no output schema and no safety annotations, the description is severely incomplete. It does not explain the optional parameters, return value, failure conditions, or how this reply differs from creating an annotation. An agent could call it based on the two required fields but would be guessing about the rest.

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 0%, and the description provides almost no parameter-level meaning. It hints that parentId refers to an existing annotation and note is likely the reply text, but the eight parameters (kind, mood, tags, quote, bookId, chunkId, parentId, note) are otherwise unexplained. The description fails to compensate for the schema's complete lack of documentation.

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 uses a specific verb ('Attach') and resource ('Claude reply under an existing user or Claude annotation'). It clearly indicates the tool creates a nested reply to an annotation, and the 'existing' qualifier distinguishes it from sibling tools like reading_annotate_passage that create new top-level annotations.

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?

The description implies the tool is used when an annotation already exists and requires attaching a reply to it. However, it does not explicitly state when to use this tool versus alternatives such as reading_annotate_passage, nor does it mention any exclusions or prerequisites beyond 'existing annotation.'

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