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

Annotations flag a non-readonly mutation, and the description usefully clarifies that it 'does not create or approve a file' and that it is version-bound with an authoritative return, which resolves the apparent tension between write semantics and non-creation. It also surfaces the blocking behavior for unsupported Office rewrites/PDF overlays. It does not describe idempotency-key replay semantics or rate/validation failure modes beyond the one null-expectedAssignment hint.

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?

The description is dense but front-loads the core purpose and constraints, and most sentences carry real information (prerequisites, first-assignment rule, non-creation, blocked operations). It is somewhat packed and mixes workflow instructions with behavioral caveats, which slightly hurts scannability.

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 15-parameter, 8-required tool with nested objects, no output schema, and near-zero schema coverage, the behavioral/gating context is reasonably complete, but the description cannot carry the parameter burden. An agent still lacks guidance on most required inputs, so it is only minimally sufficient.

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 only 7% across 15 parameters, so the schema does very little explaining. The description compensates only for expectedAssignment (null for the first assignment) and gestures at version/target authority; it leaves planRevision, draftRevision, confirmationId, selection, sectionIds, adaptiveRevision, consistencyFacts, and all pdf/docx/xlsx target shapes undocumented.

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 a specific verb ('Prepare') and a clearly bounded resource ('a version-bound assignment for filling an original... or attaching it unchanged'), which is distinguishable from siblings like submit_client_file or read_client_file_assignment. It stops short of explicitly contrasting those siblings, but the operation is unambiguous.

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 states concrete prerequisites (enabled managed files, exact-plan agreement, all source/draft/adaptive approval gates), gives an edge-case rule ('Use expectedAssignment=null for the first assignment'), and outlines the intended workflow ('Read all assignment/original pages, fill a copy and submit actual bytes'). It does not name alternative tools or state outright when not to use this one.

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