has_namespace

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

No annotations are provided, and the description does not disclose any behavioral traits beyond the basic operation. It does not mention authentication, rate limits, or side effects, which is acceptable for a simple read-only check. The description is adequate but not rich.

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 concise with two sentences plus structured Args/Returns sections. Every sentence adds value, and there is no redundancy or unnecessary information. It is well-organized and easy to parse.

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 is simple, and the description covers the core functionality and parameters. An output schema exists, so return values are documented externally. However, it lacks information on error cases or permissions, which would be helpful for completeness.

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, so the description carries the full burden. It thoroughly explains both parameters: namespace as 'Name of the namespace to check for existence' and ref as 'The ref, branch name or tag name to check the namespace on.' This adds significant meaning beyond the raw schema.

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 purpose: 'Check if a specified namespace exists', specifying the verb 'check' and the resource 'namespace'. It also includes the context of a branch, distinguishing it from sibling tools like create_namespace or get_namespaces. The description is specific and unambiguous.

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 when to use the tool (to check namespace existence), but does not explicitly state when not to use it or provide alternatives. Given siblings like has_branch and has_table, the context is clear, but no explicit guidance is provided.

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