update_doc

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

No annotations are present, so the description alone must carry the behavioral burden. It discloses mode placement and that a confirmation is returned, but it never states what 'replace' does to existing content, whether permissions are needed, or how failures are handled—critical for a mutation tool.

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 compact and front-loaded: one-purpose sentence, a clean Args block, and a Returns line. No filler or redundant restatement of the schema.

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?

It provides enough detail to call the tool with valid arguments and understand the basic return. However, the lack of annotations plus missing details about replace semantics, document existence requirements, and error cases leaves an agent with meaningful uncertainty about side effects.

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 Args section compensates by explaining all three parameters: document_id, text, and mode with its allowed values. It is slightly weakened by describing text as 'Text to add,' which is awkward for the replace mode, and by not defining how replace applies the text.

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 opening sentence 'Update content in a Google Doc' identifies the operation and target resource, and the three modes (append/prepend/replace) make the update behavior concrete. This clearly separates it from siblings like create_doc and read_doc.

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?

No guidance is given about when to choose this tool versus create_doc, read_doc, or export_pdf. There are no stated prerequisites or conditions, so an agent must infer from the function name that it operates on an existing document.

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