AI agents call diagnostics to retrieve information from Mcp Oceanbase without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and reports on the status of a database tenant—a read-only diagnostic operation. It retrieves information about operational health without altering state or triggering external systems. While it may reveal sensitive infrastructure details, the core function is informational (Read category).
From the tool's definition Tool name 'diagnostics' and description 'Diagnose the operational status of a tenant' indicate data retrieval and analysis only. No modification, deletion, execution, or financial operations are implied.
Documented attack patterns abuse exactly the kind of access diagnostics gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Oceanbase, and nothing reaches the server without passing your rules. This is the rule we recommend for diagnostics:
{
"version": "1",
"default": "deny",
"tools": {
"diagnostics": {}
}
}diagnostics is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Diagnose the operational status of a tenant. It is categorised as a Read tool in the Mcp Oceanbase MCP Server, which means it retrieves data without modifying state.
Register the Mcp Oceanbase MCP server in PolicyLayer and add a rule for diagnostics: 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 Oceanbase. Nothing to install.
diagnostics 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 diagnostics 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 diagnostics. 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.
diagnostics is provided by the Mcp Oceanbase MCP server (oceanbase/awesome-oceanbase-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 134 Mcp Oceanbase tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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134 Mcp Oceanbase tools catalogued and risk-classified — across an index of 42,500+ MCP servers.