getCredentialGuide

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

Despite no annotations, the description fully discloses behavior: it is a read-only guide that returns structured credential setup info. It reveals that Meta DAT credentials are only needed for real hardware, not simulator. The return structure is detailed (metaCredentials, serviceCredentials, etc.) with no hidden side effects.

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 well-structured and front-loaded with the main purpose. It is somewhat lengthy but every sentence adds value. Could be slightly more concise, but overall efficient for the amount of detail.

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 description is complete for a guide tool: no output schema exists, but the return structure is fully detailed. It also provides usage context, cross-links, and platform-specific guidance. All relevant aspects are covered.

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 67%, and the description adds meaning beyond the schema: it explains that omitting services returns a Meta-DAT-only guide, and clarifies handler matching by name patterns. The platform parameter is not described in schema or description beyond being required, but context is sufficient.

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 tool returns step-by-step credential setup for Meta DAT build identity and BYOK providers. It specifies the verb 'return' and the resource 'credential setup', distinguishing it from sibling tools like getCredentialStatus/setCredential by noting they are for the account-vaulted path.

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?

Explicitly states when to use: 'when wiring a new BYOK provider or graduating from simulator to real hardware.' Also states when not to use: 'DON'T USE during the simulator-only dev loop.' Provides cross-links to related tools for context.

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