set_spawn_ownership

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

Annotations already declare the safety profile (destructive=true, idempotent=true, readOnly=false), so the description is not obligated to restate it. It adds value by disclosing the return shape, including the saved flag and optional save_error, which signals a save attempt may fail. However, it says nothing about what the ownership change affects at runtime or what conditions cause save_error.

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?

Two sentences: the action first, the return contract second, with no filler. Front-loaded and appropriately sized for a simple setter, though the returns block is verbose relative to the action statement.

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?

No output schema exists, and the description compensates by spelling out the returned fields. Combined with 100% schema coverage and annotations covering the safety profile, an agent has enough to call it correctly; only the runtime effect of the policy and save-failure conditions remain unexplained, which are minor gaps for a setter.

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 all four parameters are already documented, including the ownership enum values (InnerSequence | RootSequence | External) and the binding_guid provenance. The description adds no meaning beyond the schema, so the baseline of 3 is appropriate.

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 gives a specific verb ("Set") and a precise resource ("the ESpawnOwnership lifetime policy of a spawnable custom binding"), which is concrete and non-tautological. It distinguishes the tool's narrow policy-setting job from siblings like get_sequence_spawnables or add_spawnable_to_sequence, though it never names those siblings explicitly.

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?

There is no when-to-use guidance, no prerequisites (e.g., the binding must already exist), and no stated alternatives. The agent must infer from the name and parameter set that this is a post-binding configuration step. Only implied usage is available.

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