Register Prismism Account

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

No annotations provided, so description carries full burden. Excellently discloses irreversible behavior: 'API key is returned once and cannot be retrieved again'. Warns of data loss risk if not saved. Minor gap: doesn't specify behavior if email already registered or rate limits.

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?

Three sentences with zero waste: 1) Purpose, 2) Usage classification, 3) Critical warning. Front-loaded with action and resource. Every sentence earns its place.

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?

Compensates well for missing output schema by describing the return value (API key) and critical handling requirements. Given simple 2-parameter input with complete schema coverage, description adequately covers complexity. Minor gap on error conditions (duplicate email).

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 has 100% description coverage ('Your name', 'Your email address — use a real email you can access'). Description adds no parameter-specific semantics, but with complete schema coverage, baseline 3 is appropriate.

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?

Clear verb 'Create' + specific resource 'Prismism account' + outcome 'get an API key'. The 'one-time setup' framing distinguishes this initialization tool from sibling management tools like prismism_account, prismism_update, and prismism_delete.

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 'one-time setup tool' establishing when to use it. Provides critical handling instruction to 'save it to your MCP config immediately'. Minor deduction for not explicitly naming what to use if account already exists (likely prismism_account).

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