Gets the stored descriptions for fields of a specific table (if they exist).
AI agents call get-field-descriptions to retrieve information from MCP Firebird without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves metadata (field descriptions) from a Firebird database table. It queries existing data without side effects, modification, or code execution. It cannot delete, create, modify, or execute anything. The blast radius of misuse is minimal - an AI agent could only learn structural information about tables, which poses negligible security risk.
From the tool's definition Tool description states it 'Gets the stored descriptions for fields of a specific table' - a retrieval operation with no modification or execution capability. The verb 'Gets' indicates a simple read operation.
Documented attack patterns abuse exactly the kind of access get-field-descriptions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Firebird, and nothing reaches the server without passing your rules. This is the rule we recommend for get-field-descriptions:
{
"version": "1",
"default": "deny",
"tools": {
"get-field-descriptions": {}
}
}get-field-descriptions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Gets the stored descriptions for fields of a specific table (if they exist). It is categorised as a Read tool in the MCP Firebird MCP Server, which means it retrieves data without modifying state.
Register the MCP Firebird MCP server in PolicyLayer and add a rule for get-field-descriptions: 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 Firebird. Nothing to install.
get-field-descriptions 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 get-field-descriptions 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 get-field-descriptions. 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.
get-field-descriptions is provided by the MCP Firebird MCP server (purodelphi/mcpfirebird). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 22 MCP Firebird tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
22 MCP Firebird tools catalogued and risk-classified — across an index of 42,500+ MCP servers.