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toolfunnel_run_tool

Execute a registered tool by name, passing optional structured arguments through a policy-enforcing gate that returns ok, output, or error.

Instructions

Execute one register tool by its name through the gateway PreToolUse gate. Args: { name, args? }. Call toolfunnel_tool_instructions first to learn the tool's arg shape. Returns { ok, output, error? }. Every call is gated (a PreToolUse hook may deny it).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
argsNoStructured arguments forwarded to the tool. Optional.
nameYesExact tool name from toolfunnel_list_tools.
Behavior3/5

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

No annotations exist, so description carries full burden. Reveals return shape and gating behavior, but lacks details on error handling, idempotency, or side effects. Adequate but not thorough.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Very concise: three sentences, front-loaded with purpose, then args and behavior. No wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Return format is explained even without output schema. Gating is mentioned. Could elaborate on error cases (e.g., tool not found), but for a generic runner this is acceptable.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema already covers both parameters (100% coverage). Description adds valuable context by instructing to call toolfunnel_tool_instructions for arg shape, and summarizes the arg structure. Clearer than schema alone.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool executes a registered tool by name, and distinguishes it from sibling tools (list, instructions, howto) which are about discovery and learning.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides explicit guidance to call toolfunnel_tool_instructions first to learn args, and notes that calls are gated and may be denied. However, no explicit when-not-to-use or alternatives among siblings.

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

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