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

Beyond the minimal annotations, the description discloses one-off invocation behavior, connect links for auth, checkout/top-up links for billing, the implicit install behind invoke, and workspace owner/admin requirements for writes. No contradiction with annotations.

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?

Long but appropriately structured with 'Core flow', 'KEY', and explicit scenario comparisons. Every sentence adds actionable detail, and the most important behavioral notes are front-loaded.

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?

For a complex multi-action tool with no output schema, the description covers auth, billing, permissions, MCP vs prompt library separation, and install/invoke trade-offs. Minor gaps remain in exact response shapes and per-action parameter behavior, but overall it is highly complete.

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 schema has 0% description coverage, so the description must explain parameters. It does explain the central action parameter and the roles of mcp_id, tool_id, and arguments, plus some prompt fields. However, many optional parameters like limit, immediate, tier_slug, cancel_reason, report_context, request_name/details, and prompt_targets are left undefined.

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 description clearly defines the marketplace as both a catalog and an execution platform, with a specific core flow (search → describe → invoke). It also distinguishes itself from sibling tools by emphasizing in-platform catalog/run capabilities and the prompt library functionality.

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 explicit guidance on when to use invoke vs install ('prefer invoke for a single/occasional use', 'Use install only to make an MCP PERMANENT'), and calls out report_bug, request_mcp, and list_tools as alternatives. The prompt library actions are also clearly separated from MCP actions.

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