list_api_keys
AI agents call list_api_keys to retrieve information from Nebulablock 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 API keys associated with the user's account. While it is read-only and does not modify data, the sensitivity is elevated to 'medium' because API keys are security credentials; their exposure could enable unauthorized access to the account and related resources.
From the tool's definition Tool name is 'list_api_keys', which is a query operation that retrieves a list of existing API keys. The 'list' verb indicates data retrieval without modification.
Attacks that exploit this kind of access
list_api_keys. It is categorised as a Read tool in the Nebulablock MCP Server, which means it retrieves data without modifying state.
Register the Nebulablock MCP server in PolicyLayer and add a rule for list_api_keys: 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 Nebulablock. Nothing to install.
list_api_keys 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_api_keys 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_api_keys. 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_api_keys is provided by the Nebulablock MCP server (nebula-block-data/nebulablock-mcp-server). 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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