List all accessible databases in the MariaDB server.
AI agents call list_databases to retrieve information from MariaDB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about available databases without side effects. It is a pure read operation that enables exploration and discovery of database structures. The severity is low because listing databases exposes only structural information and does not permit data access, modification, or external operations.
From the tool's definition Tool is described as part of a 'secure read-only operations' server that 'Supports database exploration, schema inspection, and SQL query execution.' The tool name 'list_databases' performs a listing operation with no data modification, deletion, or execution…
Attacks that exploit this kind of access
List all accessible databases in the MariaDB server. It is categorised as a Read tool in the MariaDB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MariaDB MCP Server MCP server in PolicyLayer and add a rule for list_databases: 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 MariaDB MCP Server. Nothing to install.
list_databases 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_databases 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_databases. 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_databases is provided by the MariaDB MCP Server MCP server (yawlhead91/mariadb-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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