Update DataLens workbook

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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds real behavioral value by disclosing patch semantics ('what is not given stays as it is'), which annotations do not convey.

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?

A single economical sentence with the operation front-loaded and the partial-update caveat appended. Nothing is wasted.

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 3-param mutation whose safety traits are already carried by annotations and whose parameters are fully schema-documented, the description is sufficient. Only a hint about when to choose it over related workbook tools is missing.

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 title/description/workbook_id are already documented in the schema; the baseline of 3 applies. The patch-semantics sentence adds partial-update meaning for the optional fields, a marginal lift over the schema.

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 states a specific verb+resource+scope: 'Change a workbook's title or description'. That is clear enough to distinguish it from sibling datalens_workbooks_create/delete/move/get, though it doesn't explicitly name an alternative.

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 when-to-use guidance or alternatives are offered. An agent must infer from the name alone whether this is the right tool versus datalens_entries_rename, datalens_workbooks_move, or datalens_workbooks_access_bindings_update.

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