Show available data sources and their status.
AI agents call sources to retrieve information from Claude Oracle without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though sources only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
Show available data sources and their status. It is categorised as a Read tool in the Claude Oracle MCP Server, which means it retrieves data without modifying state.
Register the Claude Oracle MCP server in PolicyLayer and add a rule for sources: 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 Claude Oracle. Nothing to install.
sources 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 sources 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 sources. 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.
sources is provided by the Claude Oracle MCP server (vvkmnn/claude-oracle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.