Generate image descriptions using Runware's API. Analyzes images to produce accurate and concise captions that can be used to create additional images or provide detailed insights into visual content. This function enables AI-powered image analysis to generate descriptive text prompts from images...
Part of the Mcp Runware server.
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AI agents use imageCaption to create or modify resources in Mcp Runware. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call imageCaption repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Mcp Runware.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"imageCaption": {
"limits": [
{
"counter": "imagecaption_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Mcp Runware policy for all 11 tools.
These attack patterns abuse exactly the kind of access imageCaption gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Generate image descriptions using Runware's API. Analyzes images to produce accurate and concise captions that can be used to create additional images or provide detailed insights into visual content. This function enables AI-powered image analysis to generate descriptive text prompts from images. It's useful for understanding image content or generating prompts for further image creation. IMPORTANT: For inputImage, only accept: 1. Publicly available URLs (e.g., "https://example.com/image.jpg") 2. File paths that can be processed by imageUpload tool first 3. Runware UUIDs from previously uploaded images Workflow: If user provides a local file path, first use imageUpload to get a Runware UUID, then use that UUID here. Args: inputImage (str): Image to analyze. ACCEPTS ONLY: Public URLs, Runware UUIDs, or file paths (use imageUpload first to get UUID). Supported formats: PNG, JPG, WEBP includeCost (bool, optional): Include generation cost in response taskUUID (UUID, optional): Unique task identifier Returns: dict: A dictionary containing the caption generation result with status, message, result data (including the generated text), and cost if requested.. It is categorised as a Write tool in the Mcp Runware MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Runware MCP server in PolicyLayer and add a rule for imageCaption: 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 Mcp Runware. Nothing to install.
imageCaption is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the imageCaption 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 imageCaption. 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.
imageCaption is provided by the Mcp Runware MCP server (elijahdev0/mcp-runware). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Mcp Runware tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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