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

The description discloses that stored data (session and vault PDAs) are visible on-chain metadata, and advises to store only encrypted payloads or public hashes. It also mentions pricing and routing considerations. These details go beyond the annotations, which only indicate non-destructive and open-world hints. No contradiction with annotations found.

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 relatively concise but includes extraneous instructions about SAP MCP workflow, pricing, and routing that could be streamlined. The first sentence is effective, but the subsequent bullet points add redundancy and may overwhelm an agent with too much operational 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 covers on-chain visibility, pricing, and signing boundaries, which are useful. However, it does not describe the return value or success indicators, though an output schema exists. More critically, it leaves the parameter structure ambiguous due to the flawed schema. Combined with the sibling 'sap_compact_inscribe_memory', a more complete description would help the agent choose correctly.

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?

The input schema defines no properties (properties: {}), yet the schema description text lists expected fields (sequence, encryptedData, etc.). This is confusing and the tool's description does not clarify the expected parameters beyond the generic 'Inscribe encrypted memory'. With effective parameter coverage being poor due to missing schema properties, the description adds insufficient value for an agent to correctly construct the input.

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 first sentence clearly states the tool's purpose: 'Inscribe encrypted memory using SDK VaultModule.inscribe.' It specifies the action (inscribe) and resource (encrypted memory). However, it does not differentiate from the sibling tool 'sap_compact_inscribe_memory', which likely has a similar purpose.

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 some usage context, including pricing ('paid read-premium; estimate first') and execution constraints ('do not call this as a paid hosted write'). However, it lacks explicit guidance on when to use this tool versus alternatives like 'sap_compact_inscribe_memory' or other memory tools. The guidance is more about operational constraints than selection criteria.

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