Execute a read-only SQL query against the PostgreSQL database. This tool only allows SELECT statements and other read operations. All authenticated users can use this tool.
AI agents call queryDatabase to retrieve information from My Credentials MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool is restricted to SELECT and read-only operations with no ability to modify, delete, or execute arbitrary code. While database access carries inherent risks (data exposure), the read-only constraint places it firmly in the Read category. The authentication and RBAC mentioned in server description provide additional controls, justifying low severity.
From the tool's definition Tool description explicitly states 'Execute a read-only SQL query' and 'only allows SELECT statements and other read operations.' Name and description both confirm retrieval without side effects.
Attacks that exploit this kind of access
Execute a read-only SQL query against the PostgreSQL database. This tool only allows SELECT statements and other read operations. All authenticated users can use this tool. It is categorised as a Read tool in the My Credentials MCP Server MCP Server, which means it retrieves data without modifying state.
Register the My Credentials MCP Server MCP server in PolicyLayer and add a rule for queryDatabase: 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 My Credentials MCP Server. Nothing to install.
queryDatabase 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 queryDatabase 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 queryDatabase. 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.
queryDatabase is provided by the My Credentials MCP Server MCP server (preangelleo/my-credentials-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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