set_default_handle

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

Annotations declare readOnlyHint=false, idempotentHint=false and destructiveHint=false, so the mutation profile is partly covered. The description adds nothing about the side effect that matters most — that setting a default presumably unsets the previous default — nor about permissions or error cases. The endpoint path is the only added information.

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 text says 'Set default handle' twice (once as prose, once after the PATCH path). It is short but entirely redundant rather than economical — the space is wasted on repetition instead of the missing behavioral detail.

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?

A state-changing, non-idempotent operation on a domain resource with no output schema; the description should explain the exclusivity semantics and any prerequisites. Instead it only repeats the name and the HTTP route, leaving the agent unable to predict the result.

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 only handleId and a trace header, so the schema fully documents the inputs. The description adds no meaning beyond the schema; baseline 3 applies.

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 is 'Set default handle', a verbatim restatement of the tool name and annotation title, plus the raw endpoint path. It never explains what a 'default handle' governs (e.g., the registrar handle used for a domain), so the agent learns nothing beyond the name itself.

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?

No when-to-use guidance and no mention of the closely related siblings update_handle, retrieve_handle, or list_handles. The agent is left to infer whether this supersedes an existing default or requires prior state.

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