create_item_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. It states this is an 'Add' operation (implying creation/mutation) but doesn't disclose permission requirements, rate limits, whether reactions are unique per user, what happens on duplicate attempts, or any side effects. The Qiita Team restriction is helpful context but insufficient for a mutation tool.

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 with zero wasted words. It's appropriately sized for a simple tool and front-loads the core functionality. Every element earns its place.

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 mutation tool with no annotations and no output schema, the description is incomplete. It doesn't explain what the tool returns, error conditions, or important behavioral aspects like whether reactions are user-specific or global. The Qiita Team restriction is valuable but insufficient given the tool's complexity and lack of structured metadata.

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%, with both parameters clearly documented in the schema. The description doesn't add any additional parameter semantics beyond what the schema provides (item_id and name). No examples beyond the schema's 'e.g. '+1', 'heart'' are given. Baseline 3 is appropriate when 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 an item'), providing a specific verb+resource combination. It distinguishes from siblings like 'create_comment_reaction' by specifying 'item' rather than 'comment', but doesn't fully differentiate from 'create_comment_reaction' in terms of when to choose one over the other.

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 some context with '(Qiita Team only)', indicating a platform restriction, but offers no guidance on when to use this tool versus alternatives like 'create_comment_reaction' or 'delete_item_reaction'. No explicit when/when-not instructions or prerequisite information is included.

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