Search 1.8B+ archived images on Arquivo.pt (Dionisius image search).
AI agents call image_search to retrieve information from Arquivo Pt without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only search tool that queries an existing archive of images without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—an agent could only retrieve image search results from public historical web archives, with no side effects or data modification possible.
From the tool's definition Tool performs 'Search' on archived images with no modification, deletion, or execution capabilities. Description indicates retrieval-only functionality: 'Search 1.8B+ archived images on Arquivo.pt'.
Attacks that exploit this kind of access
Search 1.8B+ archived images on Arquivo.pt (Dionisius image search). It is categorised as a Read tool in the Arquivo Pt MCP Server, which means it retrieves data without modifying state.
Register the Arquivo Pt MCP server in PolicyLayer and add a rule for image_search: 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 Arquivo Pt. Nothing to install.
image_search 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 image_search 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 image_search. 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.
image_search is provided by the Arquivo Pt MCP server (thaenor/arquivo-pt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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