Add Sanity remote MCP server

[jonahsnider]

MCP Server Information

Server Name: Sanity
Repository URL: https://github.com/sanity-io/agent-toolkit
Brief Description: Direct access to your Sanity projects (content, datasets, releases, schemas) and agent rules

Basic Requirements

• Open Source: Uses acceptable license (Apache-2.0, MIT, BSD-2-Clause, BSD-3-Clause or other permissive license)
• MCP Compliant: Implements MCP API specification
• Active Development: Recent commits and maintained
• Docker Artifact: Dockerfile
• Documentation: Basic README and setup instructions
• Security Contact: Method for reporting security issues

Submitter Checklist

• This server meets the basic requirements listed above
• I understand this will undergo automated and manual review.
• I have tested the MCP Server using task validate -- --name SERVER_NAME
• I have built the MCP Server using task build -- --tools SERVER_NAME
• If the server requires credentials to test it, I have shared test credentials using this form