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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the description doesn't need to repeat those. The addition of 'owner-private' provides some scope/behavior context beyond the schema. However, it does not disclose whether the update is partial or full replacement, whether it is reversible, or any permission requirements. With annotations covering the basic safety profile, the description adds minimal extra value.

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 one sentence, which is concise and front-loads the action ('Update'). However, it is so brief that it omits valuable information. It earns its place as a clear purpose statement, but the structure is not used to convey any additional guidance. It is appropriately sized for a minimal purpose statement, but not for a tool with 8 parameters.

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 tool has 8 parameters, 7 optional, and an output schema. The output schema covers return values, so that is not a gap. However, the description does not explain what fields are updateable, what 'owner-private' means, or how workspace_id/workspace_name relate to the item. Given the low schema coverage and the number of ambiguous parameters, an agent would not have enough information to call the tool correctly without additional external knowledge.

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 25% (only workspace_id and workspace_name have descriptions). The description does not compensate by explaining any of the other six parameters (name, note, labels, keywords, description). An agent has no idea what 'name' or 'note' mean in this context, or whether 'labels' and 'keywords' are lists of tags. The description adds zero parameter meaning, so the low schema coverage is unmitigated.

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'), a specific resource ('Collect+ item'), and two scope qualifiers ('owner-private' and 'in a workspace'). This clearly distinguishes it from other update tools like update_document and update_note, which operate on different resource types. An agent can tell exactly what this tool acts on.

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 purpose implies the tool is used when you need to modify an existing owner-private Collect+ item. However, there is no explicit guidance on when to prefer this over alternative tools, no mention of prerequisites (e.g., need for owner access), and no exclusion cases. The usage context is implied by the verb and resource name, but not explicitly stated.

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