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matt-coppinger

Horizon MCP Server

create_application_pool

Publish a new RDS farm application pool so users can launch a specified executable or shortcut via Horizon. Set the pool name, farm ID, and executable path to add it to the app catalog.

Instructions

Publish a new application pool from an RDS farm.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesInternal name (no spaces recommended)
farm_idYesRDS farm ID — obtain from list_rdsh_farms
versionNoApplication version string
publisherNoPublisher name shown in the app catalog
display_nameNoUser-visible display name (defaults to name)
executable_pathYesFull path to the executable or .lnk shortcut, e.g. C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MyApp.lnk
enable_pre_launchNoPre-launch the app before the user connects
multi_session_modeNoMulti-session mode: DISABLED (one session per user), ENABLED_DEFAULT_OFF, or ENABLED_DEFAULT_ON.DISABLED
enable_client_restrictionsNoRestrict which clients can launch the app

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.9/5.0
Behavior2/5

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

Annotations already declare the safety profile (readOnly=false, destructive=false, idempotent=false), so the description only needs to add context beyond that. It adds almost none: no note on what happens with duplicate names, required permissions, whether publishing is reversible, or side effects on the target farm.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single front-loaded sentence with zero filler, correctly sized for a one-line summary. It is efficient, though its brevity leaves the definition thin overall rather than earning a 5 for well-structured completeness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be explained, and annotations carry the safety profile. However, for a 9-parameter mutation tool with a required farm dependency, the description omits creation semantics and side effects, leaving it only minimally complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so all 9 parameters, including the multi_session_mode enum and executable_path format, are already documented in the schema. The description contributes no parameter meaning beyond that, which is the expected baseline of 3 when the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Publish a new application pool') plus its source ('from an RDS farm'), which is enough to separate it from create_desktop_pool, create_rdsh_farm, and update_application_pool. It stops short of explicitly naming the siblings it is not, so it lands at 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.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives no when-to-use guidance, no prerequisites (e.g. that an RDS farm must already exist), and no routing to alternatives. The only prerequisite hint, 'obtain from list_rdsh_farms', lives in the farm_id schema description, not in the tool description.

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