create_comment_reaction

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

With no annotations provided, the description carries full burden for behavioral disclosure. While 'Add' implies a write/mutation operation, it doesn't specify whether this requires authentication, what permissions are needed, whether reactions are unique per user, or what happens on duplicate reactions. The description doesn't mention rate limits, side effects, or what the tool returns upon success/failure.

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, efficient sentence that communicates the core functionality and key constraint. Every word earns its place - 'Add an emoji reaction' (action), 'to a comment' (target), '(Qiita Team only)' (platform restriction). No wasted words or redundant information.

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 2-parameter mutation tool with no annotations and no output schema, the description is minimally adequate. It states what the tool does but lacks crucial context about authentication requirements, error handling, return values, and differentiation from similar tools. The 'Qiita Team only' constraint is helpful, but more behavioral context would be needed for optimal agent usage.

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 both parameters are documented in the schema. The description adds no additional parameter information beyond what's in the schema - it doesn't explain valid emoji names beyond the example, comment ID format, or parameter interactions. The baseline of 3 is appropriate when the schema does the heavy lifting.

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 ('Add an emoji reaction') and target resource ('to a comment'), making the purpose immediately understandable. It also specifies the platform constraint ('Qiita Team only'), which adds useful context. However, it doesn't explicitly differentiate from sibling tools like 'create_item_reaction' or 'create_project_comment_reaction', which perform similar reaction operations on different resources.

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 provides no guidance on when to use this tool versus alternatives like 'create_item_reaction' or 'create_project_comment_reaction'. It mentions 'Qiita Team only' which is a platform constraint but doesn't help the agent choose between similar reaction tools. There's no mention of prerequisites, error conditions, or typical use cases.

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