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

Description says 'operation class read' but annotations have readOnlyHint=false, creating a contradiction. Additionally, provides some behavioral info like signer boundary, but the contradiction undermines trust.

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?

First sentence is concise, but description includes extensive SAP MCP boilerplate that repeats multiple times, making it unnecessarily long. Could be trimmed to essential 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 presence of output schema, description sufficiently covers usage flow and prerequisites. However, does not address error conditions or limitations, and the contradiction reduces completeness.

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%, so baseline 3. Description adds that the tool builds and optionally wraps a URL, which is already implied by parameter names. No additional semantic depth beyond schema.

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 'Build and optionally wrap a Solana Action URL for sharing as a Blink.' Specific verb and resource, and distinguishes from siblings like blinks_executeAction, blinks_getAction, etc.

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: 'Use for Solana Actions and Blinks metadata fetch, validation, and POST action preparation.' Also provides workflow steps: 'call sap_estimate_tool_cost first, then use sap_payments_call_paid_tool if the runtime cannot handle x402 natively.'

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