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

Annotations indicate readOnlyHint=false, destructiveHint=false, and idempotentHint=true. The description does not contradict these, but it also adds little behavioral context. It does not explain what 'update' entails, whether it creates or modifies a handoff, what side effects occur, or what 'privacy-filtered' means operationally. With no output schema and no additional behavioral disclosure, the description leaves the agent guessing about the tool's runtime behavior.

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 short sentence, so it is concise and front-loaded. However, it is under-specified: the sentence is grammatically awkward and packs vague jargon ('hosted create chat handoff', 'privacy-filtered project metadata') without earning its place. It is not verbose, but it sacrifices clarity for brevity.

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?

Given the tool has six parameters, a nested object, no output schema, and no parameter descriptions, the description is far from complete. It does not explain the purpose of the handoff, the role of idempotencyKey, the meaning of 'privacy-filtered', or what a successful update returns. The sibling list includes related tools like record_chat_handoff_delivery, but the description does not help an agent choose among them.

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%, so the description must compensate for the six parameters, but it does not. It mentions 'project metadata' but does not explain how projectId, handoffId, sessionId, executionId, idempotencyKey, or details relate to the operation. The nested 'details' object with status, summary, and referenceIds is entirely unexplained. The description adds no parameter-level meaning beyond the raw 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 says 'Update hosted create chat handoff using privacy-filtered project metadata.' The verb 'Update' is clear, but the resource 'hosted create chat handoff' is awkward and unclear—it is not obvious what a 'create chat handoff' is or what 'hosted' means. The phrase 'using privacy-filtered project metadata' hints at a data source but does not clarify the tool's core function. It does not distinguish itself from siblings like record_chat_handoff_delivery or create_presentation_request.

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 provides no explicit guidance on when to use this tool versus alternatives. It does not mention any conditions, prerequisites, or exclusions. The only contextual clue is the phrase 'privacy-filtered project metadata,' which implies a specific data context but is too vague to serve as actionable usage guidance. An agent would have to infer when to call this tool from its name and schema alone.

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