vision.fit_replacement_font
Fit redistributable replacement fonts to observed geometry without target font bytes.
This record as markdown: /tools/visionmcp/vision.fit-replacement-font.md
What vision.fit_replacement_font does on Visionmcp
AI agents call vision.fit_replacement_font 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 vision.fit_replacement_font is rated Low
This tool appears to analyze observed geometry to fit replacement fonts, which is a read/query-style operation that doesn't modify persistent data. It computes font fitting parameters based on geometry without requiring the original font bytes, suggesting a computational/analytical operation. Confidence is moderate because the description is brief and doesn't explicitly clarify whether results are written anywhere.
From the tool's definition Fit redistributable replacement fonts to observed geometry without target font bytes
Attacks that exploit this kind of access
The rule that runs vision.fit_replacement_font 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 vision.fit_replacement_font, this is the rule to start with:
vision.fit_replacement_font 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 vision.fit_replacement_font call is checked against it from then on.
Questions about vision.fit_replacement_font
Fit redistributable replacement fonts to observed geometry without target font bytes. 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 vision.fit_replacement_font: 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.
vision.fit_replacement_font 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 vision.fit_replacement_font 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 vision.fit_replacement_font. 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.
vision.fit_replacement_font 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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