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

With no annotations provided, the description must disclose behavioral traits. It does mention the write-tier status and approval requirement ('first use may require a manager's approval; a from-now-on approval makes future calls seamless, a just-once approval re-asks next time'), which is valuable. However, it does not clarify whether updates are partial or full replacements, what happens if required fields are omitted, or the effect on unspecified fields. The schema describes 'Omit to leave the existing binding untouched' but this is not repeated in the description.

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 appropriately sized and front-loaded with the core purpose. It contains two short paragraphs plus a routing note and approval note. It is concise but not excessively terse. The routing line 'Edit a saved Playbook → use this' is slightly redundant given the first sentence, but overall it is well-organized and easy to scan.

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 tool with 10 parameters, no output schema, and no annotations, the description covers purpose, usage, and approval but leaves out some operational details. It does not mention that updates are partial (only changed fields are updated), the effect of omitting fields (except via schema), or any error/validation outcomes. It also doesn't note that companyId is required (though that's in the schema). Given the complexity, a bit more context on update semantics would improve completeness.

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 each parameter has a description. The tool description adds some context by grouping parameters ('changing title, how-to / instructions, status, category, assignee, or OKR binding') and clarifying identification via title or ID. However, it does not add new semantic meaning beyond the schema's own descriptions, such as validation rules or precedence (which are in the schema). The description adds marginal value, so it meets baseline but does not exceed it.

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 clearly states the verb 'update' with the resource 'Playbook' and lists the specific aspects that can be changed (title, status, category, assignee, OKR binding). It explicitly notes this is for existing playbooks, distinguishing it from create/archive/run tools. The phrase 'Identify by title or ID' further defines how to target the resource.

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 gives explicit when-to-use conditions: 'Use when changing title, how-to / instructions, status, category, assignee, or OKR binding.' It also provides a routing hint 'Edit a saved Playbook → use this.' However, it does not explicitly mention alternatives like create_playbook for new playbooks or list_playbooks for viewing, nor state when NOT to use this tool beyond the implicit 'existing' qualifier.

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