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

Annotations provide no read-only or destructive hints, so the description bears the full burden. It discloses that the tool does not expose keypair bytes, adding safety context. This is helpful beyond annotations. However, it does not mention idempotency or whether it has any side effects, but for a pure read of a public key, this is sufficient.

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 needlessly verbose for a simple tool. After the first sentence, it includes a large block of 'SAP MCP execution guidance' that is redundant with the input schema and not specific to this tool. This bloats the description without adding value, harming conciseness.

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 the core function (return public key, no exposure of keypair bytes). However, it does not mention the output format or that an output schema exists. The execution guidance is generic and not tool-specific. For a simple read tool, completeness is adequate but could be improved.

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 for the single parameter (profileName) is 100% with a clear description. The tool description adds no further explanation about the parameter's usage or behavior. Baseline 3 is appropriate as the schema already provides the necessary semantic information.

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?

Title and description clearly state the tool returns the public agent key for a profile. The description explicitly says it does not read or expose keypair bytes, distinguishing it from other tools that might handle private keys. Among many sap_ tools, this one has a unique and clear 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 implies usage when you need a public key without exposing private key material, but does not explicitly state when to prefer this over alternatives. No guidance on prerequisites or context. The input schema's 'SAP MCP execution guidance' is not about usage scenarios.

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