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32 lines
1.1 KiB
Text
32 lines
1.1 KiB
Text
---
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title: response_limiting
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sidebarTitle: response_limiting
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---
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# `fastmcp.server.middleware.response_limiting`
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Response limiting middleware for controlling tool response sizes.
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## Classes
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### `ResponseLimitingMiddleware` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/response_limiting.py#L21" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
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Middleware that limits the response size of tool calls.
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Intercepts tool call responses and enforces size limits. If a response
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exceeds the limit, it extracts text content, truncates it, and returns
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a single TextContent block.
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**Methods:**
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#### `on_call_tool` <sup><a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/middleware/response_limiting.py#L105" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
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```python
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on_call_tool(self, context: MiddlewareContext[mt.CallToolRequestParams], call_next: CallNext[mt.CallToolRequestParams, ToolResult]) -> ToolResult
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```
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Intercept tool calls and limit response size.
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