MCP Surface Lint
What this MCP does
Audits MCP tool definitions for token cost, schema quality, and interface design issues.
Tools
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'url': {'type': 'string', 'format': 'uri', 'description': 'Public HTTPS Streamable HTTP MCP endpoint to inspect.'}, 'headers': {'type': 'object', 'description': 'Optional HTTP headers sent only while reading the remote tools/list response.', 'additionalProperties': {'type': 'string'}}, 'snapshot': {'description': "A tools/list JSON response, MCP Surface Lint snapshot, or client tool dump containing a tools array. Each tool needs `name`, or the Cursor-style `tool` alias. Forward another installed server's complete tool definitions here — do not invent schemas."}}, 'additionalProperties': False}
Output schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['staticAnalysis', 'targetToolsInvoked', 'grade', 'server', 'source', 'stats', 'scores', 'findingCounts', 'findings'], 'properties': {'grade': {'enum': ['A', 'B', 'C', 'D', 'F'], 'type': 'string'}, 'stats': {'type': 'object', 'required': ['toolCount', 'approxTokens', 'encoding'], 'properties': {'encoding': {'type': 'string'}, 'toolCount': {'type': 'integer', 'minimum': 0}, 'approxTokens': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}, 'scores': {'type': 'object', 'required': ['composite', 'categories'], 'properties': {'composite': {'type': 'integer', 'maximum': 100, 'minimum': 0}, 'categories': {'type': 'object', 'required': ['surface', 'naming', 'descriptions', 'schemas', 'annotations', 'design'], 'properties': {'design': {'type': 'integer', 'maximum': 100, 'minimum': 0}, 'naming': {'type': 'integer', 'maximum': 100, 'minimum': 0}, 'schemas': {'type': 'integer', 'maximum': 100, 'minimum': 0}, 'surface': {'type': 'integer', 'maximum': 100, 'minimum': 0}, 'annotations': {'type': 'integer', 'maximum': 100, 'minimum': 0}, 'descriptions': {'type': 'integer', 'maximum': 100, 'minimum': 0}}, 'additionalProperties': False}}, 'additionalProperties': False}, 'server': {'type': 'object', 'properties': {'name': {'type': 'string'}, 'version': {'type': 'string'}}, 'additionalProperties': False}, 'source': {'type': 'string'}, 'findings': {'type': 'array', 'items': {'type': 'object', 'required': ['ruleId', 'message', 'severity', 'category', 'docsUrl'], 'properties': {'path': {'type': 'string'}, 'ruleId': {'type': 'string'}, 'docsUrl': {'type': 'string'}, 'message': {'type': 'string'}, 'category': {'enum': ['surface', 'naming', 'descriptions', 'schemas', 'annotations', 'design'], 'type': 'string'}, 'evidence': {'type': 'string'}, 'severity': {'enum': ['error', 'warn', 'info'], 'type': 'string'}, 'toolName': {'type': 'string'}}, 'additionalProperties': False}}, 'findingCounts': {'type': 'object', 'required': ['bySeverity', 'byCategory'], 'properties': {'byCategory': {'type': 'object', 'required': ['surface', 'naming', 'descriptions', 'schemas', 'annotations', 'design'], 'properties': {'design': {'type': 'integer', 'minimum': 0}, 'naming': {'type': 'integer', 'minimum': 0}, 'schemas': {'type': 'integer', 'minimum': 0}, 'surface': {'type': 'integer', 'minimum': 0}, 'annotations': {'type': 'integer', 'minimum': 0}, 'descriptions': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}, 'bySeverity': {'type': 'object', 'required': ['error', 'warn', 'info'], 'properties': {'info': {'type': 'integer', 'minimum': 0}, 'warn': {'type': 'integer', 'minimum': 0}, 'error': {'type': 'integer', 'minimum': 0}}, 'additionalProperties': False}}, 'additionalProperties': False}, 'staticAnalysis': {'type': 'boolean', 'const': True}, 'targetToolsInvoked': {'type': 'boolean', 'const': False}}, 'additionalProperties': False}
Recent tool changes
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