Limited Partnership Agreements
The LPA dictates the GP's behavior. Founders who understand the LPA understand their investor.
Concentration Limits
LPs usually cap how much of the fund the GP can put into a single company (e.g., 10-15% of the total fund). If a GP has hit this cap on your company, they legally cannot lead your next round, regardless of how much they believe in you.
Recycling Provisions
LPs allow GPs to "recycle" management fees or early small exits back into new investments, rather than distributing the cash. This allows the GP to put a full 100% of committed capital to work, rather than just 85% after fees.