merge_pull_request

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

No annotations are provided, so the description carries full responsibility for behavioral disclosure. It only states the basic action, without mentioning side effects like closing the source branch, needing merge permissions, or whether the operation is reversible. It adds little beyond what the tool name implies.

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 short sentence, which is concise, but it is under-specified for a tool with four parameters and potential side effects. It does not earn its place because it essentially restates the tool name without adding useful structure or 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?

The tool has a moderately complex operation (merge strategies, source branch behavior, message) and no annotations. While an output schema exists, the description fails to cover key aspects like when merging is allowed, what merge strategies are available, or the effect of close_source_branch. The description is too thin for the decision-making an agent must handle.

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 does not explain any of the four parameters. The schema provides names and types (e.g., merge_strategy, close_source_branch), but their meaning and behavior are not described anywhere, leaving the agent to guess.

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 ('Merge') and the resource ('a pull request'), so it identifies the core purpose. However, it does not differentiate from sibling tools like approve_pull_request or update_pull_request, though the verb 'merge' is specific enough to be understood on its own.

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. It does not mention prerequisites (e.g., required approvals, CI status), nor does it exclude cases like merge conflicts or protected branches. Sibling tools add context but are not referenced.

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