Vultr MCP

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the tool retrieves 'access logs with request details' but doesn't address important behavioral aspects like whether this is a read-only operation (implied by 'Get' but not explicit), potential rate limits, authentication requirements, pagination behavior beyond the per_page parameter, or what happens when date ranges are unspecified (since start_date and end_date have null defaults).

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 efficiently structured with a clear purpose statement followed by organized sections for Args and Returns. Every sentence earns its place by providing essential information without redundancy. The formatting with bullet-like sections enhances readability while maintaining brevity.

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?

For a tool with 4 parameters, 0% schema coverage, no annotations, and no output schema, the description provides adequate basic information about what the tool does and parameter semantics. However, it lacks important contextual details about the return format (beyond 'access logs with request details'), pagination behavior, error conditions, or authentication requirements that would be needed for comprehensive understanding.

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?

Given the 0% schema description coverage, the description compensates well by providing clear semantic information for all 4 parameters. It explains what zone_identifier accepts (origin domain, CDN domain, or UUID), specifies date format requirements for start_date and end_date, and indicates per_page is a count with a default value. This adds significant value beyond the bare schema.

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 with a specific verb ('Get') and resource ('access logs for a CDN zone'), making it immediately understandable. However, it doesn't explicitly differentiate from potential siblings like 'get_cdn_zone_stats' or 'get_cdn_zone_summary' that might provide different types of CDN zone data.

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 some usage context by mentioning 'Smart identifier resolution' for the zone_identifier parameter, which helps users understand how to identify the target zone. However, it doesn't offer explicit guidance on when to use this tool versus alternatives like 'get_cdn_zone' or 'get_cdn_zone_stats' from the sibling list, nor does it specify any prerequisites or exclusions.

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