create_entity_link

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

Annotations declare readOnlyHint=false and destructiveHint=false, so the agent already knows this is a non-destructive write. The description adds directional semantics ('works towards' → goal, 'is supported by' ← project) which clarifies link orientation, but it says nothing about duplicate handling, whether calls are additive, permission requirements, or failure behavior. Modest added value over the annotations.

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, purpose front-loaded, no filler. The second sentence is dense and its quoted relationship vocabulary with arrows is somewhat cryptic, but every clause carries information about valid inputs.

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 write tool with no output schema and only safety-hint annotations, the description covers entity types and valid relationships but omits how the target entity is referenced and what happens on invalid/duplicate links. Adequate but with a real gap for correct invocation.

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 only 67% and the nested 'entity' and 'relationship' fields have no schema descriptions at all. The description compensates by enumerating the valid relationship strings and their direction/orientation per entity type, which is the most important semantic gap. It does not explain the format of the 'entity' target reference (ID vs. key), leaving one required field ambiguous.

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 clear verb+resource: 'Link a project/portfolio/goal to other entities', and enumerates the entity types it operates on. It does not name its siblings (get_entity_links, delete_entity_link) to differentiate itself, so an agent must infer the read/delete counterparts from naming alone.

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?

No when-to-use guidance, no prerequisites, and no mention of alternatives such as get_entity_links for reading or delete_entity_link for removal. The agent must infer that this is the create counterpart of those siblings from name similarity only.

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