use_registered_tool
Invoke a registered tool with the given input data.
This record as markdown: /tools/network-tenzro-tenzro/use-registered-tool.md
What use_registered_tool does on Tenzro Ledger MCP
AI agents invoke use_registered_tool to trigger actions in Tenzro Ledger MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why use_registered_tool is rated High
This tool acts as a generic executor for other tools without built-in constraints. Given the financial and irreversible operations available on the same server (payments, minting, staking, contract calls, mandate signing), use_registered_tool could be weaponized to invoke any of these with malicious arguments.
From the tool's definition Tool name 'use_registered_tool' and description 'Invoke a registered tool with the given input data' indicates dynamic execution of arbitrary registered tools.
Attacks that exploit this kind of access
The rule that runs use_registered_tool safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Tenzro Ledger MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For use_registered_tool, this is the rule to start with:
use_registered_tool stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Tenzro Ledger MCP, apply this rule, and every use_registered_tool call is checked against it from then on.
Questions about use_registered_tool
Invoke a registered tool with the given input data. It is categorised as a Execute tool in the Tenzro Ledger MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for use_registered_tool: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Tenzro Ledger MCP. Nothing to install.
use_registered_tool is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the use_registered_tool rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for use_registered_tool. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
use_registered_tool is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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