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

Annotations already declare this as a safe read-only, non-destructive operation, and the description adds useful behavioral context: entries are newest first and include entry number, timestamp, actor, source, saved points, notes, and git commit. It also explains that sheet and Slides entries represent editing-session outcomes. It does not cover pagination, limits, or permission requirements, which keeps it from a 5.

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-loads the key information: what History contains and how entries are ordered. The second sentence is dense and slightly cryptic, but overall there is little wasted wording.

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 simple read-only tool with one parameter and no output schema, the description supplies enough return-shape detail for an agent to understand what comes back. It does not mention pagination, result limits, or error behavior, which are minor gaps for this complexity level.

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%, and the single 'doc' parameter is already documented as accepting a link or code. The description does not add further meaning, syntax, or constraints beyond the schema, so the baseline score of 3 applies.

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 identifies the resource as a doc's History and specifies the return contents and ordering ('newest first'), so an agent can tell it retrieves historical entries. It does not explicitly differentiate this from sibling tools such as changes or get, so it falls short of a 5.

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?

The description gives no explicit guidance on when to use this tool versus alternatives like changes or get. Usage is only implied by the word 'History', with no when-to-use, when-not-to-use, or alternative routing.

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