util_content_type_guess

Guess a MIME type from a filename, path, or URL extension.

SERVERDelx Mcp A2a SOURCEhttps://api.delx.ai/v1/mcp

Medium RISK CLASS

Category Write

Parameters 11 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-davidmosiah-delx-mcp-a2a/util-content-type-guess.md

WHAT IT DOES

What util_content_type_guess does on Delx Mcp A2a

AI agents use util_content_type_guess to create or update resources in Delx Mcp A2a, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Delx Mcp A2a environment.

Parameter	Type	Required	Description
`filename`	string	Yes	Filename, path, or URL used only for extension/MIME guess.

Parameters from the server's own tool schema.

RISK

Why util_content_type_guess is rated Medium

An AI agent can call util_content_type_guess faster than any human can review: one bad instruction and it creates or modifies resources in Delx Mcp A2a by the hundred, each call as confident as the last.

Risk signalsAccepts file system path (filename)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs util_content_type_guess safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Delx Mcp A2a, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For util_content_type_guess, this is the rule to start with:

util_content_type_guess Rate-limited

util_content_type_guess stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "util_content_type_guess": {
      "limits": [
        {
          "counter": "util_content_type_guess_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Delx Mcp A2a, apply this rule, and every util_content_type_guess call is checked against it from then on.

FAQ

Questions about util_content_type_guess

What does the util_content_type_guess tool do? +

Guess a MIME type from a filename, path, or URL extension. It is categorised as a Write tool in the Delx Mcp A2a MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does util_content_type_guess accept? +

util_content_type_guess accepts 1 parameter: filename. Required: filename. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on util_content_type_guess? +

Register the Delx Mcp A2a MCP server in PolicyLayer and add a rule for util_content_type_guess: 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 Delx Mcp A2a. Nothing to install.

What risk level is util_content_type_guess? +

util_content_type_guess is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit util_content_type_guess? +

Yes. Add a rate_limit block to the util_content_type_guess 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.

How do I block util_content_type_guess completely? +

Set action: deny in the PolicyLayer policy for util_content_type_guess. 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.

What MCP server provides util_content_type_guess? +

util_content_type_guess is provided by the Delx Mcp A2a MCP server (https://api.delx.ai/v1/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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