Build document from package

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions rebuilding bytes and being the read side of a round trip, but fails to note practical behaviors such as writing to outputPath vs returning inline bytes, potential overwriting, or that the 'format' field in source is unused. This lack of transparency could lead an agent to make incorrect assumptions about side effects.

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 a single, dense sentence that packs technical terminology. It is not overly long, but it is not front-loaded with the most accessible information and could be split into clearer sentences. The jargon reduces conciseness from a readability standpoint.

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?

The description provides useful conceptual context about the round-trip workflow, which helps an agent understand when and why this tool exists. However, it omits practical details like output modes (file vs inline) and any prerequisites or limitations. The rich schema covers parameters, but the lack of annotations and output schema means the description should offer more operational context. It is adequate but with clear gaps.

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 100%, so the baseline is 3. The description adds the round-trip context but does not enrich parameter meanings beyond what the schema already provides. The schema already explains fields like 'source', 'targetFormat', and 'output' in detail, so the description's contribution here is minimal.

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 clearly states the tool 'Rebuilds real document bytes in a target format from a DocumentPackage previously serialised to JSON', which is a specific verb+resource. It also frames it as the 'read side of the DocumentPackage round trip', distinguishing it from sibling conversion tools. However, the jargon ('DocumentPackage', 'onDocument callback') may not be immediately accessible to all agents, so it misses a perfect score.

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?

Usage is implied through the round-trip context and reference to a prior '--dump-package-equivalent step', but there is no explicit guidance on when to use this tool versus alternatives like convert_document or when to avoid it. The description would benefit from a direct statement like 'Use when you have a serialized DocumentPackage JSON and need to reconstruct a document.'

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