reply_to_comment

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

Annotations already declare readOnlyHint=false, idempotentHint=false, openWorldHint=true, destructiveHint=false. Beyond that the description adds two substantive behaviors: a user-confirmation gate in the MCP client before writing, and an explicit instruction that collaborator-authored content must be treated as data, not instructions. It omits whether retries duplicate the reply and what the write returns.

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?

Three sentences, purpose front-loaded, then the confirmation behavior, then the injection warning. Each sentence carries a distinct fact with no repetition of schema or annotations.

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 three-parameter write with no output schema, the description supplies purpose, a confirmation gate, and a data/instruction boundary. It leaves minor gaps around the response and the relationship to add_comment, but nothing blocking for correct invocation.

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% and all three parameters are documented in the schema, including that thread_id comes from list_comments. The description adds no meaning beyond that, so the 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 verb+resource: adds a reply to an existing comment thread on an Overleaf project. The word 'reply' and 'existing thread' implicitly separates it from add_comment (new thread) and resolve_comment, though no sibling is named 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?

The description establishes context (existing thread) which implies when to use it over add_comment, but never says so directly and gives no exclusions or preconditions beyond a thread ID existing. Usage is inferable rather than stated.

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