open_project

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

With no annotations, the description carries the full behavioral burden, and it discloses almost nothing. It does not say whether opening a project discards the currently loaded project, what happens to unsaved changes, or whether it errors on a missing/invalid file path — all material for a state-replacing load operation.

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 short lines, front-loaded with the action, and the Args block is justified by the added path detail. Minor formatting overhead from the 'Args:' scaffold, but no wasted prose.

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 simple one-parameter open operation with no output schema, the description covers what it does and the parameter. However, with zero annotation coverage it omits the key side-effect question (what happens to the currently open project), which an agent needs before invoking a destructive-by-replacement load.

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 coverage is 0%, so the description must compensate, and it does: 'Full path to the .rpp file' clarifies both the required absolute-path form and the expected file type, meaningfully more than the bare 'string' in the schema. It stops short of format/existence details.

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+resource ('Open a REAPER project file'), which clearly distinguishes it from siblings like create_project, save_project, and get_project_path. It stops short of explicitly naming those siblings or contrasting scope, so it lands at a solid 4 rather than 5.

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?

There is no when-to-use guidance at all: nothing says this must precede other project operations, nor how it relates to create_project or save_project. Usage is only implied by the tool name.

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