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

With no annotations, the description carries the full burden and does add genuinely useful context: re-planning happens server-side and caller-supplied provider IDs, endpoints, or tool names are never trusted, which tells the agent not to attempt to supply them. However it omits whether the executed tool can mutate state, permission requirements, or latency/rate-limit behavior for a tool whose whole job is to run an arbitrary live-discovered tool.

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?

Two sentences, no filler, with the core action front-loaded and the trust-model caveat following. The second sentence earns its place by preempting a likely caller mistake.

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?

An output schema exists so return values need not be described. But for a tool that executes arbitrary live-discovered tools with zero annotations, the safety and side-effect profile is left entirely unstated, leaving the description incomplete on the one dimension that matters most here.

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 description coverage is 100% for both parameters, so baseline 3 applies. The description clarifies that the request is natural-language and the route is server-replanned, but adds no detail about how 'arguments' is bound to the provider tool beyond what the schema already states.

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?

States a specific verb and resource: route a natural-language request and execute the selected live-discovered MCP tool. The verb 'execute' is clearly distinct from sibling names like discover_capabilities and compare_capabilities, though the description never names them directly.

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?

No explicit when-to-use guidance. It implies this is the final step after routing, but never tells the agent that discover_capabilities must precede it or when compare_capabilities is the better call. The agent must infer the workflow from sibling names alone.

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