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

With no annotations at all, the description carries the full burden and does so unusually well: it enumerates what is deliberately NOT carried over (assignments, task links, evidence, attempts, deadlines, payment authority) and rules out charges, task awards, automatic execution, and access grants. What is missing is whether archive is reversible and what each action returns, which for a multi-action mutation tool is meaningful.

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 carries real content — the exclusions and idempotency policy are not filler. However, the opening sentence crams four distinct actions into one long clause chain, which harms scanning, and 'Review the scope before use' is a vague instruction that costs a sentence without adding actionable direction.

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 four-branch, no-annotation, no-output-schema tool of high complexity, the description covers the critical ground: side effects, non-copied data, idempotency discipline, and the absence of financial or access consequences. Gaps remain around return values and the semantics of revision/archive, but nothing an agent would get catastrophically wrong is omitted.

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 100%, so baseline is 3. The description still adds genuine value the schema cannot convey: the idempotency key must be persisted before sending and reused only for exact retries, and the explicit confirm/authorize booleans are framed as intentional acknowledgements. It does not explain what 'revision' represents, which is the one opaque param left.

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 four concrete operations with specific verbs and resources (save a snapshot, instantiate a plan, archive a playbook, link a task to a milestone), which matches the four oneOf branches exactly. It is clear what the tool does, though the front-loaded multi-clause sentence blurs the boundaries between the four actions rather than enumerating them crisply.

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 supplies a precondition ('a project you own') and a caution ('Review the scope before use'), plus explicit idempotency-retry policy. It never says when to pick this over the obvious sibling get_project_playbooks for reading, nor states when the archive or link_task branches are appropriate. Usage 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.