create_execution

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

Annotations already indicate this is a write operation, and the description adds valuable behavioral detail: the created execution starts empty, and the response embeds the entire execution under an 'execution' key. It also flags the critical quirk that execution.id is the useful identifier, not a top-level id, which agents need to know for subsequent calls.

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?

Every sentence earns its place: it states the purpose, clarifies the boundary vs. create_test_collection, explains the response shape and key id, and closes with actionable next steps. No filler or redundant restating of the schema.

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 creation tool with 10 parameters and no output schema, this description is unusually complete. It covers what the tool creates, what the response contains, how to identify the created resource, and which subsequent tools to invoke. Nothing critical is missing for an agent to call it correctly.

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 parameters are already well documented in the input schema. The description does not explain parameter specifics beyond noting the required projectId and name, but it compensates slightly by explaining what happens after creation. This meets the baseline for full schema coverage.

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 names a specific action and resource ('Create a Manual Test Execution') and defines it as the top-level container on the Executions page. It explicitly distinguishes this tool from create_test_collection and notes the intended composite scope, so an agent can clearly tell it apart from sibling tools.

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 gives direct usage direction: use this tool for assembling an execution from several collections/suites, use create_test_collection for a single grouping of cases. It also tells the agent what to do next after creation, listing add_suites_to_execution, add_collections_to_execution, and add_cases_to_execution, leaving no ambiguity about when and how to use it.

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