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

Adds substantial behavior beyond the annotations: completion time is stamped on 'done' and cleared on any other status, 'blocked' appends a dated journal entry, the call executes immediately rather than proposing, and the change is undoable from the same surface. There is mild tension between destructiveHint=true and the 'everything destructive still proposes' policy line, but the description explicitly carves this tool out as a self-record write, so it clarifies rather than contradicts.

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?

Front-loads the core action and statuses, then uses a labeled 'CONFIRMATION:' block for the execution-policy detail. Dense and mostly earning its space, though the plan_token and 'everything destructive…' policy sentences are meta-commentary that adds length without changing how the agent calls the tool.

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 2-parameter mutation with no output schema, it covers side effects, confirmation semantics, and the shape of the result ('an ordinary result, not a plan_token'). Missing only edge-case behavior (task not found, id format), which is a minor omission at this complexity.

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 0% schema description coverage the description must carry the load, and it does explain the meaning and consequences of each status value plus the reachability constraint on task_id. It never clarifies the task_id type (integer or string) or the failure behavior for an unknown/foreign task id, leaving one real gap.

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 and resource ('move one of the caller's personal tasks to a new status'), enumerates the exact status vocabulary, and scopes reachability to the caller's own task. It is distinguishable from the generic sibling update_task by the personal-task scope and the status-only mutation.

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?

Gives clear conditional guidance for the non-obvious case: use 'blocked' with numbered journal questions rather than guessing, and what 'done' vs. other statuses imply. It does not explicitly name when to pick update_task or update_inbox_status instead, so routing guidance is implied rather than stated.

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