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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. Beyond that, the description adds a genuine behavioral trait: results come from a cache, warning the agent that content may be stale. It does not mention pagination behavior despite limit/offset parameters, which is the main remaining omission.

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?

Two tight sentences with no filler: the operation and scope come first, the routing constraint second. Every clause earns its place and nothing is repeated from the title or annotations.

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?

An output schema exists, so return values need not be described, and annotations cover safety. However, a four-parameter paginated list tool with zero schema documentation leaves the agent without guidance on paging or on how section/collection narrow results, which is a meaningful gap for correct invocation.

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 0% across four parameters: limit, offset, section, and collection have no descriptions, types only, and defaults. The phrase 'hierarchy and article metadata' faintly implies that section and collection act as filters, but neither the meaning nor the accepted values of any parameter are explained, so the description does not compensate for the coverage gap.

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?

States a specific verb and resource: 'List the cached SheetsFinance Docs hierarchy and article metadata.' The 'cached' qualifier and the hierarchy/metadata scope tell the agent exactly what is returned, though it never distinguishes itself from docs_search or docs_get, only from workbook_plan.

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?

Explicitly bounds use ('only to orient documentation research') and names a concrete alternative with the condition that selects it ('use workbook_plan directly when the goal is to build a spreadsheet'). The gap is that the two closest siblings, docs_search and docs_get, are never mentioned, so the agent must still guess when to search or fetch instead of list.

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