create_claude_code_session

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

With no annotations provided, the description discloses one behavioral trait: 'May be gated per account'. However, it does not indicate whether the tool is destructive, requires permissions, or has side effects like starting a long-running session. The return value is mentioned, but deeper behavioral context is missing.

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 extremely concise: two short sentences with the key action upfront. Every word adds value, with no extraneous information. It front-loads the purpose and includes return value and a behavioral note efficiently.

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 tool with no output schema, the description helpfully states the return value. However, it omits context about what a Claude Code session entails, how the session URL is used, error scenarios, or prerequisites. It is adequate for a simple creation tool but could be more informative.

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?

The input schema has 0% description coverage, and the tool description only implicitly references 'projectId' by saying 'Open the project'. It does not explain what the 'instructions' parameter does. The description adds minimal semantic value beyond the schema field names.

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 tool's action ('Open the project as a Claude Code session') and the return value ({ sessionUrl }). It effectively specifies the resource (project) and the type of session. Among siblings, no other tool directly opens a Claude Code session, so it is well-distinguished.

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 (e.g., new_conversation). It only mentions that it 'may be gated per account', which is a behavioral note, not usage context. There is no explicit when-to-use or when-not-to-use information.

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