Visum Thinker MCP Server

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

With no annotations provided, the description carries the full burden. It discloses that the tool loads a layout into an opened project (implying a mutation/write operation) and mentions file existence requirements, but lacks details on permissions needed, error handling, or what happens if the layout fails to load. It adds some context but not comprehensive behavioral traits.

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?

Two sentences with zero waste: the first states the purpose and constraints, the second provides critical usage guidance. It's front-loaded with the core action and efficiently includes essential prerequisites without redundancy.

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 mutation tool with no annotations and no output schema, the description is reasonably complete: it covers the action, prerequisites, and file requirements. However, it lacks details on error cases or return values, which would be helpful given the tool's complexity. Sibling context is well-addressed via the project_list_available_layouts reference.

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 100%, so the schema already fully documents both parameters (projectId and layoutFile). The description adds marginal value by emphasizing the layout file must exist and can be a full path or filename, but doesn't provide syntax or format details beyond what the schema specifies. Baseline 3 is appropriate when schema does the heavy lifting.

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 specific action ('Load a Global Layout') and resource ('.lay file into an opened Visum project'), distinguishing it from siblings like project_list_available_layouts (which lists layouts) and project_export_graphic_layout (which exports layouts). It specifies the file format (.lay) and context (opened project).

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?

Explicitly states when to use this tool ('ALWAYS use project_list_available_layouts first to show available options to the user'), providing clear prerequisites and distinguishing it from the sibling tool that lists layouts. It also specifies the file location requirement ('must exist in the project directory or provide full path').

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