GNS3 Network Simulator MCP Server

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'configure' implies a write/mutation operation, the description lacks critical behavioral details: it doesn't specify whether this requires authentication (though parameters suggest it might), what happens on failure (e.g., partial execution), whether configurations are applied immediately or saved, or any rate limits. The optional 'save_config' parameter hints at persistence behavior, but this isn't explained in the description text itself.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is appropriately sized and front-loaded: the first sentence clearly states the purpose, followed by a structured 'Args:' section. However, the 'Args:' formatting is slightly verbose for a tool description (it mimics code documentation), and the second sentence could be more integrated. Overall, it's efficient with minimal waste.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (5 parameters, mutation operation, no annotations) and the presence of an output schema (which relieves the description from explaining return values), the description is moderately complete. It covers the core operation and key parameter details but misses authentication context, error handling, and sibling tool differentiation. For a bulk configuration tool in a network simulation context, more guidance on usage and behavior would be beneficial.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It partially documents the 'configurations' parameter by listing its keys ('node_id', 'commands', 'save_config'), which adds value beyond the schema's generic object type. However, it omits the other four parameters ('project_id', 'server_url', 'username', 'password'), leaving them undocumented. Since it covers only 1 of 5 parameters in detail, the compensation is incomplete, warranting a baseline score.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: 'Configure multiple nodes in one operation.' This specifies the verb ('configure'), resource ('nodes'), and scope ('multiple...in one operation'). However, it doesn't explicitly differentiate from sibling tools like 'gns3_update_node' (singular) or 'gns3_send_console_commands' (which might also configure nodes), so it doesn't reach the highest clarity level.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention when bulk configuration is preferred over individual node updates, nor does it reference sibling tools like 'gns3_update_node' or 'gns3_send_console_commands' that might serve similar purposes. The only implied usage is for configuring multiple nodes simultaneously, but this is already covered in the purpose statement.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.