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

The description discloses important behaviors beyond the annotations: writes require workspace owner/admin, invoke runs uninstalled MCPs without bloating the toolkit, missing credentials return a connect link, and empty wallet returns a checkout/top-up link. This adds substantial operational context that the minimal annotations do not convey.

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 dense but well-organized, starting with the marketplace's role, then the core search/describe/invoke flow, then invoke's key one-off behavior, install vs invoke, and finally the prompt library. Almost every sentence adds unique information, though the wall-of-text format and illustrative examples add some length.

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 the tool's extreme complexity—14 actions and 23 parameters with no output schema—the description covers a remarkable amount of necessary context: billing, auth, permissions, one-off execution, installation semantics, and prompt library workflows. Gaps remain around resume, immediate, tier_slug, and more granular parameter behavior, but the description is strong for such a broad dispatcher.

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?

With 0% schema description coverage and 23 parameters, the description carries a heavy burden. It explains the action enum, tool_id selection, and prompt_vars via the flow narrative, but many parameters such as immediate, tier_slug, resume, report_context, cancel_reason, and prompt_targets are left undocumented. The description compensates for the core flow but not for the full parameter surface.

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 the in-platform catalog of MCPs/tools and the mechanism to run them, which goes well beyond the bare name. It outlines distinct internal actions (search, describe, invoke, install, prompt library) and their roles, though it does not explicitly contrast the tool with sibling tools like authenticate or toolkit_info.

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 explicit when-to-use guidance: prefer invoke for one-off use, use install only for permanent toolkit additions, use request_mcp when nothing fits, and use list_tools for what is callable now. It also gives clear action sequencing (search → describe → invoke) and notes retry behavior for connect/checkout links.

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