execute_action

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

With no annotations, the description carries the full burden and does disclose the key mutation trait: destructive actions change or delete remote state, with a warning to double-check params. That is real behavioral context beyond the schema. It does not cover auth/permission requirements, idempotency, or error/side-effect behavior on partial failure, so it falls short of fully transparent.

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?

Three short sentences, front-loaded with the core action, then prerequisite, then parameter rule, then risk warning. Every sentence carries distinct, non-redundant information and there is no filler.

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 mutation tool with no annotations, no output schema, and a nested params object, the description covers purpose, prerequisite lookup, instance selection, and destructive risk. The remaining gap is return/response behavior and error handling, which matters more here because no output schema exists to fill it.

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%, so the schema already documents all four parameters, including the instance requirement and params validation. The description restates the instance selection semantics and the params-schema validation rather than adding new syntax, formats, or examples, so the baseline of 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 states a specific verb and resource ('Execute one action against one instance of a service') and bounds the scope to a single action/instance pair. It implicitly and explicitly distinguishes itself from the sibling listing tools by referencing list_actions as the lookup step that precedes execution.

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?

It gives an explicit prerequisite ('look up the action id and its params schema via list_actions first') and an explicit conditional rule for the optional parameter ('omit it only if the service has exactly one instance configured'). It also flags when extra care is warranted (destructive actions). Nothing about when to reach for this tool is left to inference.

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