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

Beyond the annotations, the description adds meaningful behavioral detail: auth requirement, read-only startup nature, versioned output, account readiness, scoping behavior for a sole organization, and choice reporting for multiple organizations. It enriches the readOnlyHint and opens up what an agent can expect without contradicting any annotation.

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 three sentences, front-loaded with 'AUTH REQUIRED; READ-ONLY STARTUP' and then immediately states the invocation condition. Every sentence contributes distinct value: return shape, account fields, organization scoping logic. No filler or repeated schema content.

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 there are no parameters and an output schema exists, the description provides complete operational context: when to call, what it returns, why it is safe, and how it behaves under different organizational configurations. Nothing an agent needs to decide invocation is missing.

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?

With zero parameters and late-stage schema description coverage already saying nothing is needed, the description has no parameter details to add. The tool requires no arguments, and this is handled well by the schema. Baseline 4 is appropriate for a zero-argument tool operating at a call result.

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 identifies the tool's purpose: a read-only startup routine invoked after OAuth to begin Spala account or project setup. It moves well beyond the name with explicit details about returning a versioned startup phase and one next action, making it easy for an agent to distinguish from generic list or status tools.

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 a concrete precondition in 'Invoke after OAuth' and explains the logic for sole versus multiple organizations, but it does not explicitly mention when not to use this tool or name alternatives in the sibling set. This is clear context with no exclusions or alternative routing, which matches the 'clear context, but no exclusions' level.

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