form_execute_external_action

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

Annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false, destructiveHint=false. The description adds only the endpoint path and '(for the UI)', giving no insight into side effects of the external action, auth requirements, or rate limits. It does not contradict annotations (it is a POST that fetches a value).

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?

Very short and front-loaded with the purpose. The endpoint path is marginal added value but not wasteful enough to penalize significantly.

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?

This is a POST with external side effects, a deeply nested body, and no output schema. The description should explain what an 'external action' entails, what the body fields mean, and the role of sourceId/projectId; it does none of this.

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?

With 67% schema coverage and a nested, complex body object, the description explains none of the parameters (body, sourceId, projectId) or their semantics. It does not compensate for the substantial undocumented portions of the complex 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?

States a specific verb ('Execute an external action') and its purpose ('to get a value'), which is clear. However, it offers no differentiation from the near-identically named sibling form_execute_external_actions (plural), so an agent cannot easily tell them apart without opening schemas.

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 only contextual hint is '(for the UI)'. There is no guidance on when to use this vs form_execute_external_actions, form_get_external_value, or form_perform_external_validation, and no prerequisites or exclusions.

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