Read Only Mode And Permission Enforcement

via “read-only mode enforcement with selective tool disabling”

Create and manage Asana tasks, projects, and workspaces via MCP.

Unique: Implements access control at tool registration layer rather than runtime, preventing write tools from appearing in MCP client UI entirely when read-only mode is enabled, rather than accepting requests and rejecting them

vs others: More secure than runtime permission checks because tools are completely unavailable to clients, eliminating risk of permission bypass bugs or accidental mutations

via “read-only guest mode for code review and observation”

Real-time collaborative editing for pair programming.

Unique: Implements read-only mode by disabling edit controls in the guest's VS Code editor and filtering out edit commands at the protocol level, preventing accidental or malicious modifications while maintaining full visibility into the codebase.

vs others: More secure than screen-sharing because guests cannot accidentally or intentionally modify files; more flexible than static code review tools because guests can navigate and explore code interactively.

via “read-only-mode-for-production-deployments”

An official Qdrant Model Context Protocol (MCP) server implementation

Unique: Implements read-only mode by conditionally registering MCP tools at startup, completely removing write capabilities rather than adding runtime checks. This is a deployment-level safety mechanism rather than a per-operation guard.

vs others: Simpler and more reliable than runtime permission checks because it prevents write tools from being registered at all; more appropriate for production than relying on client-side enforcement.

via “read-only mode enforcement with write operation blocking”

A Model Context Protocol (MCP) server for interacting with Microsoft 365 and Office services through the Graph API

Unique: Implements read-only enforcement at the tool registration layer, validating operation type before Graph API execution rather than relying on API-level permissions. Uses CLI flag and environment variable configuration for deployment flexibility.

vs others: More practical than API-level read-only because it prevents accidental writes at the application layer without requiring separate service principal setup. More auditable than relying on Graph API scopes because it's explicitly configured and logged.

via “read-only query mode with write protection”

Enhanced PostgreSQL MCP server with read and write capabilities. Based on @modelcontextprotocol/server-postgres by Anthropic.

Unique: Implements write protection at the MCP server layer (not database-level permissions), allowing the same database user to have different access levels depending on the MCP configuration. Provides a simple on/off toggle for read-only mode.

vs others: Simpler than managing database-level roles and permissions for each LLM user, but less secure than true database-level access control.

via “read-only mode enforcement with configurable write operation restrictions”

** - Access and interact with Harness platform data, including pipelines, repositories, logs, and artifact registries.

Unique: Implements read-only mode as a startup configuration flag that conditionally registers write-capable toolsets, providing a simple but effective mechanism to prevent write operations in restricted environments. The implementation enforces read-only restrictions at the toolset registration level rather than per-operation, reducing complexity.

vs others: Provides simple read-only mode enforcement through startup flags, whereas fine-grained access control systems require complex permission management and per-operation authorization checks.

via “readonly mode enforcement for safe read-only database access”

** - Leverages your Schemas and Access Patterns to interact with your [DynamoDB](https://aws.amazon.com/dynamodb) Database using natural language.

Unique: Enforces readonly mode at tool generation time rather than runtime, so write tools are completely absent from the MCP server when readonly is enabled, providing a stronger guarantee than runtime checks that could be bypassed

vs others: Simpler and more reliable than IAM-based permission control because it's enforced in the application layer without requiring AWS credential management, making it suitable for development and testing scenarios where you want to prevent accidental writes

via “read-only deployment mode for restricted access”

** - Search dashboards, investigate incidents and query datasources in your Grafana instance

Unique: Implements read-only deployment mode that disables all write operations at the tool execution layer, enforced across all transport modes and authentication contexts. Enables restricted access deployments without requiring separate server instances or custom authorization logic.

vs others: Server-level read-only enforcement vs relying on API key permissions — provides defense-in-depth by preventing write operations even if API key has write permissions, simplifies access control for restricted deployments, and enables safe sharing of mcp-grafana with external parties.

via “non-destructive and read-only operation modes”

** - Connect to Kubernetes cluster and manage pods, deployments, services.

Unique: Implements operation modes at the MCP server layer, enforcing restrictions uniformly across all clients without relying on RBAC alone. Modes are configured at startup and cannot be bypassed by individual clients.

vs others: More reliable than RBAC-only controls because operation restrictions are enforced at the application layer, preventing accidental modifications even if RBAC is misconfigured or overly permissive.

via “strict read-only enforcement with dual-layer validation”

** - Query your [ClickHouse](https://clickhouse.com/) database server.

Unique: Implements dual-layer read-only enforcement: server-side detection via get_readonly_setting() function that checks ClickHouse read_only setting and applies client constraints, combined with MCP tool schema that restricts run_select_query to SELECT statements only. This prevents both server-level write operations and protocol-level bypass attempts.

vs others: More secure than single-layer enforcement because it combines server-side setting detection with client-side validation, preventing bypass through either layer independently. Unlike generic database tools that rely solely on database permissions, this approach enforces read-only at the MCP protocol level.

via “read-only mode and permission enforcement”

MCP server for interacting with PostgreSQL databases

Unique: Implements read-only mode at the MCP server level, combining query-type validation with PostgreSQL RBAC to enforce least-privilege access. Allows safe deployment of LLM agents against production databases.

vs others: More secure than relying on LLM prompts to avoid writes — enforces read-only access at the database layer where it cannot be bypassed.