evidence.acquire_url
Acquire one pre-reviewed URL with robots, network, size, and provenance guardrails.
This record as markdown: /tools/visionmcp/evidence.acquire-url.md
What evidence.acquire_url does on Visionmcp
AI agents call evidence.acquire_url to retrieve information from Visionmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why evidence.acquire_url is rated Low
This tool retrieves content from a URL with built-in safeguards (robots.txt compliance, network limits, size checks, provenance validation). No side effects, code execution, or data modification occurs—it is fundamentally a read operation with protective boundaries. The pre-review and guardrails mitigate typical URL-fetch risks, placing it in the lowest severity category.
From the tool's definition Tool acquires data from a URL; description emphasizes 'pre-reviewed' with 'guardrails' indicating passive retrieval with safety constraints; 'acquire' suggests fetching/retrieving rather than modifying or executing arbitrary operations.
Attacks that exploit this kind of access
The rule that runs evidence.acquire_url safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Visionmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For evidence.acquire_url, this is the rule to start with:
evidence.acquire_url 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 Visionmcp, apply this rule, and every evidence.acquire_url call is checked against it from then on.
Questions about evidence.acquire_url
Acquire one pre-reviewed URL with robots, network, size, and provenance guardrails. It is categorised as a Read tool in the Visionmcp MCP Server, which means it retrieves data without modifying state.
Register the Vision MCP server in PolicyLayer and add a rule for evidence.acquire_url: 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 Visionmcp. Nothing to install.
evidence.acquire_url 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 evidence.acquire_url 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 evidence.acquire_url. 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.
evidence.acquire_url is provided by the Vision MCP server (joshuahickscorp/visionmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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