Add an element to a page. The element is appended to the end of the page. Call this sequentially — NEVER call multiple add_element in parallel. Use get_form_summary to see available pageIds. Element types and their specific params: - Input fields: input-text, input-number, input-email, input-phon...
Risk signalsAccepts URL/endpoint input (url) · High parameter count (31 properties)
Part of the Weavely AI Forms & Surveys server.
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AI agents use add_element to create or modify resources in Weavely AI Forms & Surveys. 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 add_element 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 Weavely AI Forms & Surveys.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"add_element": {
"limits": [
{
"counter": "add_element_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Weavely AI Forms & Surveys policy for all 13 tools.
These attack patterns abuse exactly the kind of access add_element 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.
Add an element to a page. The element is appended to the end of the page. Call this sequentially — NEVER call multiple add_element in parallel. Use get_form_summary to see available pageIds. Element types and their specific params: - Input fields: input-text, input-number, input-email, input-phone-number, input-url, input-time, input-date, text-area - File upload: input-file (supports maxFiles, maxFileSize, allowedFileType) - Choice fields: radio-buttons, checkbox-buttons, dropdown, ranking (require options; support randomize; radio/checkbox-buttons also support allowOtherOption) - Image choice: image-choice (requires options; supports multiple selection. NOTE: to assign images to options, use the Weavely platform after publishing) - Single checkbox: checkbox (a single yes/no toggle; supports defaultChecked) - Matrix: matrix (a grid question. matrixRows are the row labels, matrixColumns are the column options [{label, value}], matrixMultiple allows selecting multiple columns per row) - Rating: star-rating (defaults to 5 stars; supports stars count), scale-rating (defaults to 10; supports scales count), range-slider (defaults 0-100; supports min, max, step) - Display: heading, paragraph (label is the display text; paragraph supports HTML) - Media: embed-html (codeSnippet), embed-audio (url), embed-video (url). NOTE: the image element is not available through this tool — use the Weavely platform to add images. - Special: signature For choice types, provide options as [{label: "...", value: "..."}]. The value is the internal identifier (use lowercase-kebab-case).. It is categorised as a Write tool in the Weavely AI Forms & Surveys MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Weavely AI Forms & Surveys MCP server in PolicyLayer and add a rule for add_element: 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 Weavely AI Forms & Surveys. Nothing to install.
add_element 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 add_element 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 add_element. 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.
add_element is provided by the Weavely AI Forms & Surveys MCP server (florian/weavely). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Weavely AI Forms & Surveys tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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