SAP Chat Start Room

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

Annotations already indicate readOnly=false, openWorld=true, idempotent=false, destructive=false. The description adds that it creates vault, session, ledger, which is useful context beyond annotations. However, it lacks discussion of permissions, costs, or idempotency nuances, which are relevant for an on-chain operation.

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?

Single sentence, front-loaded with the primary action 'Start an on-chain SAP chat room', followed by implementation details. No extraneous words; every phrase adds value.

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?

With an output schema present, return value explanation is unnecessary. However, the description omits important context like ownership requirements, cost (SOL needed), and whether participants must already exist. The openWorldHint annotation suggests public use, but description could clarify access control.

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?

Input schema has 100% coverage with descriptions for all 5 parameters. The tool description does not add any parameter-specific information beyond what the schema provides, so score is baseline 3.

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 'Start', the resource 'on-chain SAP chat room', and the mechanism 'creating the backing vault, session, and ledger if needed'. It distinguishes itself from sibling tools like sap_chat_send_message or sap_chat_derive_room by specifying it is for initiation.

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 provides no guidance on when to use this tool versus alternatives. With many chat-related siblings (e.g., sap_chat_derive_room, sap_chat_seal_room), an agent would benefit from explicit statements about prerequisites or scenarios where this tool is appropriate.

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