Initialize SAP Vault

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

Annotations already indicate mutability (readOnlyHint=false) and non-destructiveness. Description adds that vault PDAs are visible on-chain, which is useful. However, it does not disclose idempotency or side effects beyond creation.

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?

Two succinct sentences: first states purpose, second provides security context. No redundant information.

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 the presence of an output schema and the simple input (1 param), the description adequately covers initialization context. Could mention creation outcome, but output schema handles return values.

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%; the parameter 'vaultNonce' is described in the schema as a byte/hex/base64 array. Description adds no further semantics beyond the schema, 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?

Description clearly states 'Initialize a memory vault for the connected agent.' The verb 'initialize' and resource 'memory vault' are specific. It differentiates from sibling vault tools (e.g., sap_fetch_vault, sap_open_vault_session) by being the init step.

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?

Provides guidance on appropriate usage: 'Store only intentionally encrypted payloads or public hashes' and notes that PDAs are visible on-chain. While it doesn't explicitly list alternatives, the context is clear for safe use.

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