Get the status of all data sources (theGraph, chainlist, chains, slip44)
AI agents call get_sources to retrieve information from Chains API without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and reports the status of data sources used by the blockchain chains API. It is a read-only query with no side effects, no code execution, and no data modification. The blast radius of misuse is minimal—an attacker could only gain visibility into the status of backend data sources, which is non-sensitive operational metadata. It belongs in the Read category with low severity.
From the tool's definition Tool name 'get_sources' and description 'Get the status of all data sources' indicate a query operation that retrieves metadata about data source availability/status. No modification, deletion, or external execution is performed.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Get the status of all data sources (theGraph, chainlist, chains, slip44). It is categorised as a Read tool in the Chains API MCP Server, which means it retrieves data without modifying state.
Register the Chains API MCP server in PolicyLayer and add a rule for get_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 Chains API. Nothing to install.
get_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 get_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 get_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.
get_sources is provided by the Chains API MCP server (johnaverse/chains-api). 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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