list_supported_formats
List all supported file formats that can be faxed.
This record as markdown: /tools/com-gotfreefax-mcp/list-supported-formats.md
What list_supported_formats does on GotFreeFax
AI agents call list_supported_formats to retrieve information from GotFreeFax without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why list_supported_formats is rated Low
This tool retrieves metadata about supported formats without modifying, deleting, or executing any operations. It poses minimal security risk as it only provides informational data about system capabilities. The low severity reflects the absence of any potential for misuse—an AI agent calling this tool cannot cause harm regardless of how it uses the returned information.
From the tool's definition Tool name 'list_supported_formats' and description 'List all supported file formats' indicate a retrieval operation with no side effects. The verb 'list' is a classic Read operation that queries available data.
Attacks that exploit this kind of access
The rule that runs list_supported_formats safely
PolicyLayer is an MCP gateway: it sits between your AI agents and GotFreeFax, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_supported_formats, this is the rule to start with:
list_supported_formats is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect GotFreeFax, apply this rule, and every list_supported_formats call is checked against it from then on.
Questions about list_supported_formats
List all supported file formats that can be faxed. It is categorised as a Read tool in the GotFreeFax MCP Server, which means it retrieves data without modifying state.
Register the GotFreeFax MCP server in PolicyLayer and add a rule for list_supported_formats: 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 GotFreeFax. Nothing to install.
list_supported_formats 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_supported_formats 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_supported_formats. 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_supported_formats is provided by the GotFreeFax MCP server (https://www.gotfreefax.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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