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

The annotations already indicate this is a non-read-only, non-destructive operation, and the description reinforces that by saying 'Update' and adding the explicit-confirmation gate. It does not contradict the annotations, but it also does not reveal much beyond what the schema and annotations already 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?

The description is a single, front-loaded sentence with no filler: the verb and object come first, and the important confirmation precondition is included. Every word earns its place.

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?

The output schema and annotations carry part of the burden, but this is still a mutation tool with three required parameters and two optional updateable fields. The description is minimally adequate for selection, yet it leaves the agent to infer what can actually be updated and what the idempotency/confirmation workflow means for 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 only 40%, so the description should help clarify parameters like assistantId, name, and systemPromptId, but it does not mention any of them. The phrase 'after explicit confirmation' aligns with the `confirmed` parameter, but that is already described in the schema, so the description adds little parameter-level value.

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 ('Update') and a specific resource ('an inbound assistant'), and the word 'inbound' separates it from the sibling update_outbound_assistant. It is unambiguous and not a mere restatement of the tool name because it adds the confirmation precondition.

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?

It provides a clear precondition: the operation should only happen after explicit user confirmation. However, it does not describe when to prefer this tool over alternatives such as update_outbound_assistant, nor does it mention when NOT to use it, so the usage guidance is implied rather than explicit.

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