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

Annotations declare the safety envelope (writes but not destructive, idempotent, closed-world), and the description adds genuinely non-annotated behavior: no shared message is created, no server model runs, no automation resumes. That clarifies the surprising narrowness of a 'write' operation. It omits what is actually produced (review item? new draft version?) and how expected_draft_version conflicts are handled.

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 tight sentences, the affirmative action first and the caveats second, with no redundant restatement of the name or annotations. Every clause carries distinct information.

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?

With no output schema and 6 undocumented required parameters, the description should explain what the call produces and what the draft versioning expects; it instead only enumerates side effects that do not occur. It is adequate to route the call but leaves an agent guessing about success shape and version-conflict behavior.

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 0% across all six required parameters, and the description supplies no parameter meaning at all — nothing on expected_draft_version's optimistic-concurrency role, idempotency_key, the 12-item materials array, or the draft_id/conversation_id relationship. For a 6-param tool with zero schema documentation, the description was expected to carry this burden and does not.

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 concrete verb+resource ('Submit a draft for owner review') and immediately scopes it against the sending semantics of siblings like send_conversation_message by denying shared-message creation. The main ambiguity is that the tool name says 'complete' while the title/description say 'prepare/submit for review', which could momentarily confuse an agent about whether this finalizes or merely stages the draft.

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?

Provides clear negative guidance — 'creates no shared message ... does not run a server model, resume automation or send anything' — which effectively tells the agent when NOT to reach for this versus a send/resume tool. It stops short of explicitly naming which sibling to use instead or stating preconditions, so it is strong context rather than a full when/when-not/alternatives mapping.

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