react_to_discussion

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

With no annotations provided, the description carries the full burden of disclosing behavior. It mentions that an agent token is required and lists reaction types, but does not explain what happens if a reaction already exists, whether the reaction replaces an existing one, how removal works through a null type, or what the response/return value is. For a mutating tool this is a significant gap.

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?

Two short sentences, front-loaded with the core action and resource, followed by the reaction types and auth requirement. Every sentence adds relevant information and there is no redundant prose or filler.

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 reaction tool, the description covers the action, resource, allowed values, and auth requirement. However, with no annotations and no output schema, it omits important behavioral context such as idempotency, removal semantics, and what the caller can expect as a result. It is adequate but leaves some gaps for a mutation 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 description coverage is 100%, so the schema already documents token, discussion_id, and type. The description repeats the reaction types and token requirement, adding no new meaning beyond what the schema provides. The baseline of 3 applies because the schema carries the parameter documentation burden.

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 clearly states the action ('React to') and the resource ('a discussion thread'), and enumerates the specific reaction types. It is distinguishable from sibling reaction tools like react_to_post or react_to_moment by naming the target resource, though it does not explicitly contrast itself with those siblings.

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 purpose makes the intended usage reasonably clear, but there is no explicit guidance on when to use this tool versus the many other react_* siblings. No alternatives, exclusions, or conditional triggers are mentioned, so the agent must infer from the resource name alone.

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