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

No annotations are provided, so the description carries the full behavioral burden, and it discloses only that no provider work is started and that the task must be owned. It says nothing about whether this is a partial or full replacement of fields, what happens when the caller doesn't own the task, whether changes are reversible, or what the response contains. For an unannotated mutation tool, that is a substantial gap.

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?

A single front-loaded sentence with no filler, and the distinguishing constraint is placed immediately after the core action. It is arguably too terse for the complexity of the operation, but under-specification is captured in other dimensions rather than here.

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 five-parameter mutation tool with no annotations, no output schema, and 40% schema description coverage needs considerably more than one sentence. The key term 'provider work' is never defined, and the effect of a partial update on unspecified fields is left entirely unstated.

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 coverage is only 40% (todoId, projectId, and the status enum are undocumented in the schema), so the description needs to compensate and does not. It adds only the 'one' constraint on todoId and the ownership condition; it never explains status transition semantics, whether notes/owner are optional, or how projectId scopes the lookup.

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?

Clear verb+resource: 'Update one owned launch task' names the mutation and the target entity, and 'one' signals a single-item scope that separates it from list-style siblings like get_launch_todos. It doesn't enumerate which fields are updatable, so the agent still has to open the schema, but the tool's identity is unmistakable.

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?

'without starting provider work' implies a when-to-use boundary (use this for bookkeeping-only edits rather than anything that triggers external provider actions), and 'owned' implies an ownership precondition. Neither is stated as an explicit rule, and no sibling is named as the alternative, so guidance is implied rather than given.

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