List available S3 locations for Hostkey cloud resources. Use it to select a valid region before creating or managing buckets.
List available locations for S3 (s3/get_available_locations).
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections.
v1.0.1Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered externally. The description adds only the underlying endpoint string, with no information about auth requirements, pagination, or how locations relate to the account.
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?
A single tight sentence that leads with the verb and resource, with the endpoint parenthetical as a minor but harmless addition. Nothing wasteful.
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 zero-parameter, read-only list call with annotations covering the safety profile and no output schema, the description is sufficient to call it correctly. Only minor context, such as what a location represents or the return shape, is absent.
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 tool takes no parameters and schema coverage is 100%, so there is nothing to disambiguate. Baseline of 4 is appropriate for a zero-parameter tool.
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?
States a specific verb (List) and resource (available locations for S3), so an agent immediately knows what it returns. There is no close sibling it needs to be distinguished from among the s3_* family, so no differentiation is required.
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?
Usage is only implied: an agent can infer this is a discovery/enumeration call for S3 locations. No explicit when-to-use, prerequisites, or alternatives are provided, and none of the sibling tools are named as related choices.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.