Execute a read-only SQL query (SELECT / SHOW / DESCRIBE / EXPLAIN).
AI agents call query to retrieve information from Mcp Mysql Explorer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite 'Execute' in the description, this tool is constrained to read-only SQL operations that retrieve or query data without side effects. The enumerated allowed operations (SELECT, SHOW, DESCRIBE, EXPLAIN) are all informational and cannot modify, delete, or execute arbitrary code. This falls squarely under the Read category.
From the tool's definition Tool name is 'query' with description explicitly stating 'Execute a read-only SQL query (SELECT / SHOW / DESCRIBE / EXPLAIN)'. The restriction to read-only operations (SELECT, SHOW, DESCRIBE, EXPLAIN) confirms no data modification or deletion is possible.
Attacks that exploit this kind of access
Execute a read-only SQL query (SELECT / SHOW / DESCRIBE / EXPLAIN). It is categorised as a Read tool in the Mcp Mysql Explorer MCP Server, which means it retrieves data without modifying state.
Register the Mcp Mysql Explorer MCP server in PolicyLayer and add a rule for query: 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 Mcp Mysql Explorer. Nothing to install.
query 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 query 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 query. 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.
query is provided by the Mcp Mysql Explorer MCP server (xsg22/mcp-mysql-explorer). 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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