vpn_connect

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states the action but gives no detail on side effects, such as whether connecting interrupts an existing VPN session, whether it blocks until the connection is established, or what happens on failure. It does not explicitly contradict annotations, but it is far from sufficient.

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 exceptionally brief (two sentences, six words) and wastes no words. It front-loads the core purpose and mentions the only parameter. However, it is slightly too terse to serve as a complete guide, though the conciseness itself is appropriate.

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 that this is a network-changing tool with no annotations, no output schema, and only one undocumented parameter, the description is too sparse to be considered complete. It lacks information about the connection behavior, prerequisites, fallback options, and how it relates to sibling tools like vpn_require_active. A description of this length leaves critical gaps for an agent to invoke the tool safely and correctly.

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?

The schema has one parameter 'country' with no description; coverage is 0%. The description says 'Optional argument: country,' which adds the fact that it is optional (though schema already implies this via 'required: 0') and identifies its purpose as a country selector. However, it does not provide valid values, expected format (e.g., two-letter code vs. full name), or example inputs.

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 action ('Connect') and the resource ('NordVPN'), which is specific and unambiguous. It naturally distinguishes from siblings like vpn_status, vpn_disconnect, and vpn_public_ip by indicating a connection-establishing operation.

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 only guidance is 'Optional argument: country,' which indicates a parameter but provides no context on when to use this tool versus alternatives. It does not mention that vpn_status is for checking connection, vpn_disconnect for terminating, or any prerequisites like having config files or authenticated sessions.

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