create_branch

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

With no annotations, the description must carry the full burden of behavioral disclosure. It only says 'create a new branch' and does not disclose potential side effects, permission requirements, behavior when the branch already exists, or the role of the optional from_branch parameter. This leaves significant ambiguity 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, front-loaded sentence with no filler or redundancy. It is concise and easy to read. However, it is perhaps too minimal, as it omits critical parameter information, but conciseness itself is good.

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?

Given the tool has 4 parameters, no annotations, no output schema, and no parameter descriptions, the description is far from complete. It fails to explain the meaning of from_branch, how branch creation works, any error conditions, or the return value. This is essentially a bare minimum definition.

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%, meaning the description must compensate for the lack of parameter explanations. The description provides no information about owner, repo, branch, or from_branch. Even the schema itself lacks descriptions, so the agent is left without any semantic guidance for these parameters.

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 ('Create') and the resource ('a new branch in a repository'). It distinguishes from sibling tools like delete_branch and list_branches, and the phrase 'in a repository' differentiates it from create_repo.

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 implies the usage scenario: creating a new branch in a repository. However, it does not mention when to use this tool versus alternatives like creating a pull request or listing branches, nor does it mention any prerequisites or exclusions.

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