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

With no annotations, the description carries full responsibility for behavioral disclosure. It explains the conditional side effects (copy vs. invite link), recipient agreement, role restrictions, and the write-tier approval flow. This gives the agent a strong understanding of consequences beyond the basic action.

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 moderately sized and front-loaded with the core action. It packs routing, permissions, and approval behavior into a compact block. A few phrases are cryptic ('Operator door'), and the Routing line partly repeats the opening, but overall every sentence adds useful guidance.

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 write action with no annotations and no output schema, the description covers the key behaviors, routing, and approval requirements well. It is slightly incomplete on what happens when to_email is omitted and what response the agent should expect beyond the new-user invite link, but these are minor gaps given the schema clarity.

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 coverage is 100%, so the baseline is 3. The description adds meaningful behavioral context around to_email, explaining what happens for existing versus new users and how invite links are returned. It does not add much beyond the schema, but the conditional explanation enhances parameter understanding enough to merit a 4.

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 opens with a specific verb and resource: 'Send this Playbook.' It then clarifies the two outcomes (existing user gets the Play copied; new user gets an invite link), and the Routing line distinguishes it from other sharing tools. This is clear and actionable.

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 Routing section explicitly says when to use the tool: 'Send a Playbook to a teammate or a new person → use this.' It also provides role guidance ('Operator door. Exec cannot mint a share.') and approval expectations. However, it does not explicitly name alternative tools or state when not to use it, so it falls just short of a 5.

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