Query active DAML contracts on the shared Canton domain.
AI agents call list_daml_contracts to retrieve information from Tenzro Ledger MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or lists data (active DAML contracts) without modifying, deleting, or executing any operations. The verb 'query' and 'list' are characteristic of Read operations. Even though the server handles sensitive domains like payments and wallet functionality, this specific tool only queries contract state without making changes. The blast radius is limited to information disclosure about contract status.
From the tool's definition Tool name 'list_daml_contracts' and description 'Query active DAML contracts on the shared Canton domain' indicate a read-only query operation with no side effects.
Attacks that exploit this kind of access
Query active DAML contracts on the shared Canton domain. It is categorised as a Read tool in the Tenzro Ledger MCP MCP Server, which means it retrieves data without modifying state.
Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for list_daml_contracts: 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.
list_daml_contracts is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_daml_contracts 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 list_daml_contracts. 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.
list_daml_contracts 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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